A development board for expanding circuits

Abstract

The present invention relates to the technical field of development boards, and in particular to a development board for expanding circuits, comprising: a main control circuit and an image sensor, wherein the main control circuit is used to control the operation of each circuit; wherein: the main control circuit comprises an image processor, the image processor is electrically connected to an image signal input interface circuit, and the image processor is used for image data transmission; the image processor is electrically connected to a network communication selection interface circuit; an image signal input interface circuit; the image signal input interface circuit is used for inputting image signals; there are multiple image sensors, the image sensors are communicatively connected to an image sensor connection socket, and the image sensor connection socket is connected to an image signal input interface; the development board is convenient for software development, can be connected to different types of sensors, and can realize the development of various functions; it not only optimizes the circuit structure, but also saves the labor development cost, and has a simple structure, is easy to realize, and improves the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of development boards, and in particular to a development board for expanding circuits. Background Art

[0002] Current development boards usually integrate more module functions, resulting in a larger size, but most users ultimately only apply one or very few of these functions. Among them, consumer electronic products will use development boards, such as monitoring equipment in the security industry, image navigation equipment and camera equipment on vehicle-mounted systems, etc., which all require the use of circuit boards. However, traditional development boards do not support secondary development in actual use, and hardware debugging and software debugging of sensors from different manufacturers cannot be performed on the development board; functional requirements cannot be selected and functional testing and verification cannot be performed on the development board; and software function debugging cannot be implemented on this development board. Therefore, only external debugging is possible, the development board cannot be upgraded, and the development board has fixed resources, and its scalability is greatly limited, making it difficult to perform secondary development; the scope of application is small, and it can only be used for simple experimental development, with poor practicality, and is limited to the control of the hardware on the board, lacks additional functional expansion applications, and has low adaptability.

[0003] In this solution, users only need to simply modify the module circuits on the development board to complete the hardware development of the product. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a development board for expanding circuits that is convenient for software development, can be connected to different image sensors, and can realize the development of various functions of camera modules.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention provides a development board for expanding circuits, comprising: a main control circuit and an image sensor, wherein the main control circuit is used to control the operation of each circuit; wherein: the main control circuit comprises an image processor, the image processor is electrically connected to an image signal input interface circuit, and the image processor is used to transmit image data; the image processor is electrically connected to a network communication selection interface circuit; an image signal input interface circuit; the image signal input interface circuit is used to input image signals; there are multiple image sensors, the image sensors are communicatively connected to an image sensor connection socket, the image sensor connection socket is connected to an image signal input interface, the image signal input interface is used to input image signals, and realizes one-to-one selection of image signals, and transmits the image signals to the image processor at the same time; a network communication selection interface circuit; the network communication selection interface circuit is used to connect to WIFI or Ethernet; the image sensor acquires image signals and transmits them to the image processor through the image signal input interface circuit.

[0007] Furthermore, the network communication selection interface circuit includes an Ethernet output interface circuit, an SDIO-WIFI module antenna interface circuit and a USB-WIFI module antenna interface circuit. The Ethernet output interface circuit includes an Ethernet chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor. One end of the first resistor is connected to a 3.3v voltage, and the other end is connected to the 21st pin of the Ethernet chip. The 21st pin of the Ethernet chip is connected to the 88th pin of the image processor. One end of the second resistor is grounded, and the other end is connected to the 23rd pin of the Ethernet chip. One end of the first capacitor is grounded, and the other end is connected to the 21st pin of the Ethernet chip. One end of the second capacitor is connected to the Ethernet chip. The 29th pin of the Ethernet chip is connected to the other end of the third capacitor. One end of the third capacitor is connected to the second pin of the Ethernet chip and the other end is grounded. One end of the fourth capacitor is connected to the 30th pin of the Ethernet chip and the other end is connected to the 33rd pin of the Ethernet chip. One end of the fourth resistor is grounded and the other end is connected to the first pin of the Ethernet chip. One end of the fifth resistor is connected to the 3.3v voltage and the other end is connected to the 11th pin of the Ethernet chip. The seventh pin of the Ethernet chip is connected to the 30th pin of the Ethernet chip. One end of the fifth capacitor is connected to the 30th pin of the Ethernet chip and the other end is connected to the 33rd pin of the Ethernet chip. One end of the sixth capacitor is connected to the 14th pin of the Ethernet chip and the other end is connected to the fifth capacitor. One end of the seventh capacitor is connected to the third resistor and the other end is connected to the sixth capacitor. The common end of the seventh capacitor and the third resistor is connected to 3.3v voltage, and the common end of the fifth capacitor and the sixth capacitor is grounded, one end of the third resistor is connected to the sixth capacitor, and the other end is connected to the 30th pin of the Ethernet chip, the 23rd pin of the Ethernet chip is connected to the fifth pin of the image processor, the 22nd pin of the Ethernet chip is connected to the fourth pin of the image processor, the 28th pin of the Ethernet chip is connected to the fifth pin of the image processor, and the 26th pin of the Ethernet chip is connected to the third pin of the image processor. The SDIO-WIFi module antenna interface circuit includes a WIFi chip, a plurality of first jumper caps, a first antenna interface, a sixth resistor, an eighth capacitor, a ninth capacitor and a tenth capacitor. One end of the sixth resistor is connected to the eleventh pin of the WIFi chip, and the other end is connected to the first pin of the first antenna interface. The common end of the second pin and the third pin of the first antenna interface is grounded, the eighth capacitor and the tenth capacitor are connected in series, one end is connected to the first pin of the first antenna interface, and the other end is connected to the eighth pin of the WIFi chip, and the common end of the eighth capacitor and the tenth capacitor is connected to the second pin and the third pin of the first antenna interface, one end of the ninth capacitor is connected to the sixth resistor, and the other end is connected to the eleventh pin of the WIFi chip, and the first The first pin, the second pin, the third pin, the fifth pin, the sixth pin and the seventh pin are respectively connected to the ninth pin, the tenth pin, the eighth pin, the sixth pin, the first pin and the second pin of the image processor through a plurality of first jumper caps. The USB-WIFI module antenna interface circuit includes a seventh resistor, a USB-WIFI driver chip, a second antenna interface, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor and a fourteenth capacitor. One end of the seventh resistor is connected to the first pin of the USB-WIFI driver chip, and the other end is connected to the first pin of the second antenna interface. One end of the thirteenth capacitor is connected to the seventh resistor, and the other end is connected to the second pin and the third pin of the second antenna interface. One end of the fourteenth capacitor is connected to the first pin of the second antenna interface, and the other end is grounded. One end of the eleventh capacitor is grounded, and the other end is connected to the eleventh pin of the USB-WIFI driver chip. One end of the twelfth capacitor is connected to the eleventh pin of the USB-WIFI driver chip, and the other end is connected to the eleventh capacitor. The thirteenth pin of the USB-WIFI driver chip is connected to the fifty-fifth pin of the image processor, and the twelfth pin of the USB-WIFI driver chip is connected to the fifty-fourth pin of the image processor. .

[0008] Furthermore, the development board for the expansion circuit also includes a network port transformer output interface circuit, which is connected to the Ethernet network output interface circuit. The network port transformer output interface circuit includes a network port transformer, a network interface, a first transient diode, a second transient diode, a third transient diode, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth capacitor, a sixteenth capacitor and a seventeenth capacitor. The ninth pin and the tenth pin of the network interface are grounded. One end of the thirteenth resistor is connected to the fourth pin and the fifth pin of the network interface, and the other end is connected to the fifteenth pin of the network port transformer. One end of the twelfth resistor is connected to the seventh pin and the eighth pin of the network interface, and the other end is connected to the thirteenth resistor. One end of the tenth resistor is connected to the third pin of the network port transformer, and the other end is connected to the fourth pin of the Ethernet chip. The ninth resistor One end is connected to the first pin of the network port transformer, and the other end is connected to the third pin of the Ethernet chip; one end of the first transient diode is connected to the first pin of the network port transformer, and the other end is connected to the third pin of the network port transformer; one end of the second transient diode is connected to the sixth pin of the network port transformer, and the other end is connected to the eighth pin of the network port transformer; one end of the third transient diode is connected to the fifteenth pin of the network port transformer, and the other end is grounded; one end of the fifteenth capacitor is grounded, and the other end is connected to the second pin of the network port transformer; one end of the sixteenth capacitor is grounded, and the other end is connected to the seventh pin of the network port transformer; the eighth resistor is connected in series with the seventeenth capacitor, one end is connected to the third transient diode, and the other end is connected to the tenth pin of the network port transformer; one end of the eleventh resistor is connected to the second transient diode, and the other end is connected to the sixth pin of the Ethernet chip; one end of the fourteenth resistor is connected to the sixth pin of the network port transformer, and the other end is connected to the fifth pin of the Ethernet chip.

[0009] Furthermore, the expansion circuit also includes a low-power WIFI module circuit, which is connected to the image processor via an SPI communication interface. The low-power WIFI module circuit includes a third antenna interface, a low-power WIFI chip, a crystal oscillator, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor and a twenty-second capacitor. The second pin and the third pin of the third antenna interface are grounded, one end of the fifteenth resistor is connected to the first pin of the third antenna interface, and the other end is connected to the twentieth pin of the low-power WIFI chip, one end of the nineteenth capacitor is connected to the fifteenth resistor, and the other end is connected to the second pin and the third pin of the third antenna interface, and one end of the eighteenth capacitor is connected to the low-power The nineteenth pin and the twenty-first pin of the WIFI chip are connected in series, and the other end is connected to the fifteenth resistor. One end of the twentieth capacitor is connected to the sixteenth pin of the low-power WIFI chip. The seventeenth resistor and the eighteenth resistor are connected in series, and one end is connected to the sixth pin of the low-power WIFI chip, and the other end is connected to the fourth pin of the low-power WIFI chip. One end of the twenty-first capacitor is connected to the second pin of the low-power WIFI chip, and the other end is grounded. One end of the crystal oscillator is connected to the twenty-first capacitor, and the other end is connected to the first pin of the low-power WIFI chip. One end of the twenty-second capacitor is connected to the twenty-first capacitor, and the other end is grounded. One end of the seventeenth resistor is connected to the twenty-sixth pin of the low-power WIFI chip, and the other end is connected to the twenty-second capacitor. The sixteenth resistor is connected to the twenty-sixth pin of the low-power WIFI chip.

[0010] Furthermore, the development board for the expansion circuit also includes a low-power WIFI power supply circuit, which is electrically connected to the low-power WIFI module circuit. The low-power WIFI power supply circuit includes a power supply chip, a first inductor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor and a switch. The third pin of the power supply chip is connected to the fourth pin and the fifth pin of the low-power WIFI chip. The twenty-third capacitor is connected in parallel with the twenty-fourth capacitor, one end of which is grounded and the other end is connected to the power supply. The third pin of the power supply chip, the twentieth resistor and the twenty-fifth capacitor are connected in parallel, one end of which is connected to the third pin of the power supply chip, and the other end is connected to the fifth pin of the power supply chip, the nineteenth resistor has one end connected to the fifth pin of the power supply chip, and the other end is grounded, the twenty-second resistor, the switch and the twenty-first resistor are connected in series, one end of which is connected to the fourth pin of the power supply chip, and the other end is connected to the second pin of the power supply chip, the second pin of the power supply chip is grounded, the first pin of the power supply chip is connected to the twenty-first resistor, the twenty-seventh capacitor and the twenty-sixth capacitor are connected in parallel, one end of which is connected to the fourth pin of the power supply chip, and the other end is grounded.

[0011] Furthermore, the development board for the expansion circuit also includes a human infrared detection circuit and a human infrared detection power supply circuit, which are electrically connected to the human infrared detection circuit. The human infrared detection circuit includes an infrared sensor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor and a twenty-eighth capacitor. The third pin of the human infrared detection power supply circuit is connected to the ninth pin of the low-power WIFI chip, the fifth pin of the human infrared detection power supply circuit is connected to the sixth pin of the infrared sensor, the twenty-third resistor and the twenty-fourth resistor are connected in series, one end of which is connected to the fifth pin of the human infrared detection power supply circuit, and the other end is grounded, the sixth pin of the external sensor is connected to the common end of the twenty-third resistor and the twenty-fourth resistor, the twenty-sixth resistor, the twenty-seventh resistor and the twenty-fifth resistor are connected in series, one end is connected to the second pin of the infrared sensor, and the other end is grounded, one end of the twenty-eighth capacitor is connected to the twenty-fifth resistor, and the other end is connected to the twenty-seventh resistor, and the fifth pin of the infrared sensor is connected to the eighth pin of the low-power WIFI chip.

[0012] Furthermore, the development board for expanding the circuit also includes a filter switching drive circuit, which is connected to the image processor through multiple second jumper caps. The filter switching drive circuit includes a filter switching driver, a 2P interface, a 29th resistor and a 30th resistor. The third pin of the filter switching driver is connected to the 84th pin of the image processor through the second jumper cap, one end of the 29th resistor is connected to the fifth pin of the filter switching driver and the other end is connected to the third pin of the 2P interface. The third pin and the fourth pin of the 2P interface are grounded, the second pin of the 2P interface is connected to the sixth pin of the filter switching driver, the first pin of the 2P interface is connected to the first pin of the filter switching driver, and one end of the 30th capacitor is connected to the first pin of the 2P interface, and the other end is connected to the first pin of the filter switching driver.

[0013] Furthermore, the development board for expanding the circuit also includes a human shape detection module interface circuit and a human shape detection module interface power supply circuit, the human shape detection module interface circuit and the human shape detection module interface power supply circuit are electrically connected, and the third pin of the human shape detection module interface power supply circuit is connected to the twenty-fifth pin of the low-power WIFI chip.

[0014] Furthermore, the development board for expanding the circuit also includes a storage circuit, which is connected to the image processor, and the storage circuit includes a storage chip and a thirty-first capacitor, the seventh pin of the storage chip is connected to the sixty-first pin of the image processor, the fifth pin of the storage chip is connected to the sixty-seventh pin of the image processor, the ninth pin of the storage chip is connected to the sixty-seventh pin of the image processor, and the third pin of the storage chip is connected to the sixty-sixth pin of the image processor.

[0015] Furthermore, the development board for the expansion circuit also includes a power supply circuit, which includes a power input circuit, a charging protection circuit and a power supply circuit, and the power input circuit, the charging protection circuit and the power supply circuit are respectively connected to the image processor.

[0016] The beneficial effects of the present invention are: the development board is convenient for software development, and can be connected to different types of sensors to realize the development of various functions; it not only optimizes the circuit structure, but also saves labor development costs, and has a simple structure, is easy to implement, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a circuit schematic diagram of an image processor in a development board for expansion circuits provided by an embodiment of the present invention;

[0019] Figure 2 It is a circuit schematic diagram of an image sensor connector in a development board for expanding a circuit provided by an embodiment of the present invention;

[0020] Figure 3 It is a circuit schematic diagram of an image signal input interface in a development board for expansion circuits provided by an embodiment of the present invention;

[0021] Figure 4 It is a circuit schematic diagram of an Ethernet network output interface circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0022] Figure 5 It is a circuit schematic diagram of an SDIO-WIFi module antenna interface circuit in a development board for expansion circuits provided in an embodiment of the present invention;

[0023] Figure 6 It is a circuit schematic diagram of a USB-WIFI module antenna interface circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0024] Figure 7 It is a circuit schematic diagram of a network port transformer output interface circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0025] Figure 8 It is a circuit schematic diagram of a first jumper cap in a development board for expanding a circuit provided by an embodiment of the present invention;

[0026] Fig. 9It is a circuit schematic diagram of a low-power WIFI module circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0027] Fig.10 It is a circuit schematic diagram of an SPI communication interface in a development board for expansion circuits provided by an embodiment of the present invention;

[0028] Fig.11 It is a circuit schematic diagram of a low-power WIFI power supply circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0029] Fig.12 It is a circuit schematic diagram of a human infrared detection circuit in a development board for expanding a circuit provided by an embodiment of the present invention;

[0030] Fig.13 It is a circuit schematic diagram of a human infrared detection power supply circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0031] Fig.14 It is a circuit principle diagram of a filter switching drive circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0032] Fig.15 It is a circuit principle diagram of a human detection module interface circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0033] Fig.16 It is a circuit schematic diagram of a power supply circuit of a human detection module interface in a development board for expansion circuits provided by an embodiment of the present invention;

[0034] Fig.17 It is a circuit schematic diagram of a storage circuit in a development board for expanding circuits provided by an embodiment of the present invention;

[0035] Fig.18 It is a circuit schematic diagram of a power input circuit in a development board for expanding circuits provided by an embodiment of the present invention;

[0036] Fig.19 It is a circuit schematic diagram of a charging protection circuit in a development board for expanding a circuit provided by an embodiment of the present invention;

[0037] Fig. 20 It is a circuit schematic diagram of a power supply circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0038] Fig.21 It is a principle block diagram of a development board for expanding circuits provided by an embodiment of the present invention;

[0039] Fig. 22It is a circuit schematic diagram of a gyroscope circuit in a development board for expanding a circuit provided by an embodiment of the present invention;

[0040] Fig.23 It is a circuit schematic diagram of a USB communication interface circuit in a development board for expansion circuits provided by an embodiment of the present invention;

[0041] Fig.24 It is a circuit schematic diagram of a debugging serial port and a software burning port of a low-power WIFI chip in a development board for an expansion circuit provided by an embodiment of the present invention;

[0042] Fig.25 The present invention provides a circuit schematic diagram of an audio output amplifier circuit in a development board for expansion circuits according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0044] like Figures 1 to 25 As shown, a development board for expanding circuits includes: a main control circuit and an image sensor, the main control circuit is used to control the operation of each circuit; wherein: the main control circuit includes an image processor, the image processor is electrically connected to an image signal input interface circuit, the image processor is used for image data transmission; the image processor is electrically connected to a network communication selection interface circuit; an image signal input interface circuit; the image signal input interface circuit is used for inputting image signals; there are multiple image sensors, the image sensors are communicatively connected to an image sensor connection socket, the image sensor connection socket is connected to an image signal input interface, the image signal input interface is used for inputting image signals, and realizing a one-to-one selection of image signals, and transmitting the image signals to the image processor at the same time; a network communication selection interface circuit; the network communication selection interface circuit is used to connect to WIFI or Ethernet; the image sensor acquires image signals and transmits them to the image processor through the image signal input interface circuit.

[0045] In this embodiment, the network communication selection interface circuit includes an Ethernet output interface circuit, an SDIO-WIFI module antenna interface circuit and a USB-WIFI module antenna interface circuit. The Ethernet output interface circuit includes an Ethernet chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor. One end of the first resistor is connected to a 3.3v voltage, and the other end is connected to the 21st pin of the Ethernet chip. The 21st pin of the Ethernet chip is connected to the 88th pin of the image processor. One end of the second resistor is grounded, and the other end is connected to the 23rd pin of the Ethernet chip. One end of the first capacitor is grounded, and the other end is connected to the 21st pin of the Ethernet chip. One end of the second capacitor is connected to the Ethernet chip. The 29th pin of the chip is connected to the third capacitor at the other end. One end of the third capacitor is connected to the second pin of the Ethernet chip and the other end is grounded. One end of the fourth capacitor is connected to the 30th pin of the Ethernet chip and the other end is connected to the 33rd pin of the Ethernet chip. One end of the fourth resistor is grounded and the other end is connected to the first pin of the Ethernet chip. One end of the fifth resistor is connected to the 3.3v voltage and the other end is connected to the 11th pin of the Ethernet chip. The seventh pin of the Ethernet chip is connected to the 30th pin of the Ethernet chip. One end of the fifth capacitor is connected to the 30th pin of the Ethernet chip and the other end is connected to the 33rd pin of the Ethernet chip. One end of the sixth capacitor is connected to the 14th pin of the Ethernet chip and the other end is connected to the fifth capacitor. One end of the seventh capacitor is connected to the third resistor and the other end is connected to the sixth capacitor. The common end of the seventh capacitor and the third resistor is connected to 3.3v voltage, and the common end of the fifth capacitor and the sixth capacitor is grounded, one end of the third resistor is connected to the sixth capacitor, and the other end is connected to the 30th pin of the Ethernet chip, the 23rd pin of the Ethernet chip is connected to the fifth pin of the image processor, the 22nd pin of the Ethernet chip is connected to the fourth pin of the image processor, the 28th pin of the Ethernet chip is connected to the fifth pin of the image processor, and the 26th pin of the Ethernet chip is connected to the third pin of the image processor. The SDIO-WIFi module antenna interface circuit includes a WIFi chip, a plurality of first jumper caps, a first antenna interface, a sixth resistor, an eighth capacitor, a ninth capacitor and a tenth capacitor. One end of the sixth resistor is connected to the eleventh pin of the WIFi chip, and the other end is connected to the first pin of the first antenna interface. The common end of the second pin and the third pin of the first antenna interface is grounded, the eighth capacitor and the tenth capacitor are connected in series, one end is connected to the first pin of the first antenna interface, and the other end is connected to the eighth pin of the WIFi chip, and the common end of the eighth capacitor and the tenth capacitor is connected to the second pin and the third pin of the first antenna interface, one end of the ninth capacitor is connected to the sixth resistor, and the other end is connected to the eleventh pin of the WIFi chip, and the first The first pin, the second pin, the third pin, the fifth pin, the sixth pin and the seventh pin are respectively connected to the ninth pin, the tenth pin, the eighth pin, the sixth pin, the first pin and the second pin of the image processor through multiple first jumper caps, the USB-WIFI module antenna interface circuit includes a seventh resistor, a USB-WIFI driver chip, a second antenna interface, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor and a fourteenth capacitor, one end of the seventh resistor is connected to the first pin of the USB-WIFI driver chip, and the other end is connected to the first pin of the second antenna interface, one end of the thirteenth capacitor is connected to the seventh resistor, and the other end is connected to the second pin and the third pin of the second antenna interface, one end of the fourteenth capacitor is connected to the first pin of the second antenna interface, and the other end is grounded, one end of the eleventh capacitor is grounded, and the other end is connected to the eleventh pin of the USB-WIFI driver chip, one end of the twelfth capacitor is connected to the eleventh pin of the USB-WIFI driver chip, and the other end is connected to the eleventh capacitor, the thirteenth pin of the USB-WIFI driver chip is connected to the fifty-fifth pin of the image processor, and the twelfth pin of the USB-WIFI driver chip is connected to the fifty-fourth pin of the image processor. The network communication selection interface circuit is used to realize WIFI and network external connection. Through the USB interface, WIFI, 4G communication module or Ethernet can be connected to realize control and data transmission test. The MAC in the image processor can be connected to the Ethernet output interface circuit for Ethernet output or reuse the SPI communication interface to expand the external device SDIO-WIFi module antenna interface circuit. In the actual networking process, only one of the network output interface circuit and the SDIO-WIFi module antenna interface circuit can be selected.

[0046] In this embodiment, the development board for expanding the circuit also includes a network port transformer output interface circuit, which is connected to the Ethernet output interface circuit. The network port transformer output interface circuit includes a network port transformer, a network interface, a first transient diode, a second transient diode, a third transient diode, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth capacitor, a sixteenth capacitor and a seventeenth capacitor. The ninth pin and the tenth pin of the network interface are grounded, one end of the thirteenth resistor is connected to the fourth pin and the fifth pin of the network interface, and the other end is connected to the fifteenth pin of the network port transformer, one end of the twelfth resistor is connected to the seventh pin and the eighth pin of the network interface, and the other end is connected to the thirteenth resistor, one end of the tenth resistor is connected to the third pin of the network port transformer, and the other end is connected to the fourth pin of the Ethernet chip, and the ninth resistor is connected to the 10th resistor. One end of the resistor is connected to the first pin of the network port transformer, and the other end is connected to the third pin of the Ethernet chip. One end of the first transient diode is connected to the first pin of the network port transformer, and the other end is connected to the third pin of the network port transformer. One end of the second transient diode is connected to the sixth pin of the network port transformer, and the other end is connected to the eighth pin of the network port transformer. One end of the third transient diode is connected to the fifteenth pin of the network port transformer, and the other end is grounded. One end of the fifteenth capacitor is grounded, and the other end is connected to the second pin of the network port transformer. One end of the sixteenth capacitor is grounded, and the other end is connected to the seventh pin of the network port transformer. The eighth resistor is connected in series with the seventeenth capacitor, and one end is connected to the third transient diode, and the other end is connected to the tenth pin of the network port transformer. One end of the eleventh resistor is connected to the second transient diode, and the other end is connected to the sixth pin of the Ethernet chip. One end of the fourteenth resistor is connected to the sixth pin of the network port transformer, and the other end is connected to the fifth pin of the Ethernet chip. The network transformer in the network port transformer output interface circuit is mainly used for signal level coupling. First, it can enhance the signal and make it transmit farther; second, it can isolate the Ethernet chip from the outside, greatly enhance the anti-interference ability, and increase the protection of the Ethernet chip (such as lightning strikes); third, when connected to network ports with different voltage levels (such as some PHY chips are 2.5V, some PHY chips are 3.3V), it will not affect each other's devices.

[0047] In this embodiment, the expansion circuit also includes a low-power WIFI module circuit, which is connected to the image processor via an SPI communication interface. The low-power WIFI module circuit includes a third antenna interface, a low-power WIFI chip, a crystal oscillator, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor and a twenty-second capacitor. The second pin and the third pin of the third antenna interface are grounded, one end of the fifteenth resistor is connected to the first pin of the third antenna interface, and the other end is connected to the twentieth pin of the low-power WIFI chip, one end of the nineteenth capacitor is connected to the fifteenth resistor, and the other end is connected to the second pin and the third pin of the third antenna interface. One end of the eighteenth capacitor is connected to the low-power The nineteenth pin and the twenty-first pin of the low-power WIFI chip are connected in series, and the other end is connected to the fifteenth resistor. One end of the twentieth capacitor is connected to the sixteenth pin of the low-power WIFI chip. The seventeenth resistor and the eighteenth resistor are connected in series, and one end is connected to the sixth pin of the low-power WIFI chip, and the other end is connected to the fourth pin of the low-power WIFI chip. One end of the twenty-first capacitor is connected to the second pin of the low-power WIFI chip, and the other end is grounded. One end of the crystal oscillator is connected to the twenty-first capacitor, and the other end is connected to the first pin of the low-power WIFI chip. One end of the twenty-second capacitor is connected to the twenty-first capacitor, and the other end is grounded. One end of the seventeenth resistor is connected to the twenty-sixth pin of the low-power WIFI chip, and the other end is connected to the twenty-second capacitor. The sixteenth resistor is connected to the twenty-sixth pin of the low-power WIFI chip. Fig. 9 As shown, U15 is the low-power WIFI chip MTK7682 in the low-power WIFI module circuit, CN21 is the debugging serial port and the software burning port of the low-power WIFI chip, ANT2 is the third antenna interface, and impedance matching design is required for the antenna output circuit; the SPI communication interface is Fig.10 When the J6 shown needs to be connected to an external SPI device, the jumper caps R31, R32, R33, and R34 must be connected, and the jumper caps JP23, JP24, JP25, JP26, JP27, and JP28 must be disconnected.

[0048] In this embodiment, the development board for the expansion circuit also includes a low-power WIFI power supply circuit, which is electrically connected to the low-power WIFI module circuit. The low-power WIFI power supply circuit includes a power supply chip, a first inductor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor and a switch. The third pin of the power supply chip is connected to the fourth pin and the fifth pin of the low-power WIFI chip, and the twenty-third capacitor is connected in parallel with the twenty-fourth capacitor, one end of which is grounded and the other end is connected to the The third pin of the power supply chip, the 20th resistor and the 25th capacitor are connected in parallel, one end is connected to the third pin of the power supply chip, and the other end is connected to the fifth pin of the power supply chip, the 19th resistor is connected to the fifth pin of the power supply chip at one end, and the other end is grounded, the 22nd resistor, the switch and the 21st resistor are connected in series, one end is connected to the fourth pin of the power supply chip, and the other end is connected to the second pin of the power supply chip, the second pin of the power supply chip is grounded, the first pin of the power supply chip is connected to the 21st resistor, the 27th capacitor and the 26th capacitor are connected in parallel, one end is connected to the fourth pin of the power supply chip, and the other end is grounded. The low-power WIFI power supply circuit is used to provide working power for the low-power WIFI module circuit. Fig.11 As shown, U16 is the low power WIFI power supply circuit that supplies 3.3V, where JP35 is the switch of the low power WIFI power supply circuit.

[0049] In this embodiment, the development board for expanding the circuit also includes a human infrared detection circuit and a human infrared detection power supply circuit, which are electrically connected to the human infrared detection power supply circuit. The human infrared detection circuit includes an infrared sensor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor and a twenty-eighth capacitor. The third pin of the human infrared detection power supply circuit is connected to the ninth pin of the low-power WIFI chip, the fifth pin of the human infrared detection power supply circuit is connected to the sixth pin of the infrared sensor, the twenty-third resistor and the twenty-fourth resistor are connected in series, one end of which is connected to the fifth pin of the human infrared detection power supply circuit, and the other end is grounded. The sixth pin of the external sensor is connected to the common end of the twenty-third resistor and the twenty-fourth resistor, the twenty-sixth resistor, the twenty-seventh resistor and the twenty-fifth resistor are connected in series, one end is connected to the second pin of the infrared sensor, and the other end is grounded. The twenty-eighth capacitor is connected to the twenty-fifth resistor at one end and the twenty-seventh resistor at the other end. The fifth pin of the infrared sensor is connected to the eighth pin of the low-power WIFI chip. The human infrared detection power supply circuit PIRPWREN has a low-power WIFI control PIR power switch. When the human infrared detection circuit detects a human sensing signal, PIR_WAKE outputs a high-level signal to wake up the low-power module.

[0050] In this embodiment, the development board for expanding the circuit also includes a filter switching drive circuit, which is connected to the image processor through multiple second jumper caps. The filter switching drive circuit includes a filter switching driver, a 2P interface, a 29th resistor and a 30th resistor. The third pin of the filter switching driver is connected to the 84th pin of the image processor through the second jumper cap, one end of the 29th resistor is connected to the fifth pin of the filter switching driver and the other end is connected to the third pin of the 2P interface. The third pin and the fourth pin of the 2P interface are grounded, the second pin of the 2P interface is connected to the sixth pin of the filter switching driver, the first pin of the 2P interface is connected to the first pin of the filter switching driver, and the 30th capacitor is connected to the first pin of the 2P interface at one end and the first pin of the filter switching driver at the other end.

[0051] In this embodiment, the development board for expanding the circuit also includes a human shape detection module interface circuit and a human shape detection module interface power supply circuit, the human shape detection module interface circuit is electrically connected to the human shape detection module interface power supply circuit, and the third pin of the human shape detection module interface power supply circuit is connected to the twenty-fifth pin of the low-power WIFI chip.

[0052] In this embodiment, the development board for expanding the circuit also includes a storage circuit, the storage circuit is connected to the image processor, the storage circuit includes a storage chip and a thirty-first capacitor, the seventh pin of the storage chip is connected to the sixty-first pin of the image processor, the fifth pin of the storage chip is connected to the sixtieth pin of the image processor, the ninth pin of the storage chip is connected to the sixty-seventh pin of the image processor, and the third pin of the storage chip is connected to the sixty-sixth pin of the image processor. The storage circuit is used to store data, and preferably, the storage chip can be a TF card module, a FLASH storage module, and other types of memory.

[0053] In this embodiment, the development board for the expansion circuit also includes a power supply circuit, which is connected to the image processor. The power supply circuit includes a power input circuit, a charging protection circuit and a power circuit, and the power input circuit, the charging protection circuit and the power circuit are respectively connected to the image processor. The power input circuit is used to provide working power for the development board; the development board is connected to a DC12V input (positive inside and negative outside) through the J8 socket, and the voltage is reduced to DC5V through the power input circuit U1 DC / DC. The development board can be powered by connecting the JP6 jumper cap. Q2 is a switching circuit for the 3.7v lithium battery and the USB5V power supply circuit (the LED5 lights up to indicate that the input power supply is normal). Among them, the power supply circuit U24 is a three-way DC / DC step-down circuit, which generates 3.3v, 1.8v, and 0.92v three-way power supply for the image processor and 3.3v and 1.8v required for powering the peripheral circuit. JP11 is a jumper cap that acts as the EN foot switch of U24. After connecting JP11, the three-way voltage of DC / DC is output.

[0054] It should be noted that the development board for the expansion circuit also includes a gyroscope circuit, which is connected to the image processor for communication. Fig. 22 As shown, JP11 is the start pin of the gyroscope circuit LGA12, and the gyroscope circuit and the image processor communicate via I2C.

[0055] It should be noted that the development board for expanding the circuit also includes a USB communication interface circuit, which is connected to the image processor. USB_P / USB_N is selected through JP12 / JP14 to connect to the USB-WIFI module antenna interface circuit or the USB communication interface circuit J1, thereby realizing the selection of the USB-WIFI module antenna interface circuit and the USB communication interface circuit.

[0056] It should be noted that the development board for expanding the circuit also includes an audio output amplifier circuit, which is electrically connected to the image processor. JP30 in the audio output amplifier circuit is the Enable pin of the audio amplifier. The amplifier is turned on after connecting the EN pin to D3_3v through the jumper cap JP18. Disconnect the jumper cap and set GPIO_7 to control the opening and closing of the amplifier.

[0057] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A development board for expanding a circuit, characterized in that: include: A main control circuit and an image sensor, wherein the main control circuit is used to control the operation of each circuit; wherein: The main control circuit includes an image processor, the image processor is electrically connected to the image signal input interface circuit, and the image processor is used for image data transmission; the image processor is electrically connected to the network communication selection interface circuit; Image signal input interface circuit; the image signal input interface circuit is used for inputting image signals; There are multiple image sensors, each of which is communicatively connected to an image sensor connection socket, and the image sensor connection socket is connected to an image signal input interface, and the image signal input interface is used to input an image signal and select one of two image signals, and transmit the image signal to the image processor at the same time; Network communication selection interface circuit; the network communication selection interface circuit is used to connect to WIFI or Ethernet; the network communication selection interface circuit is used to realize WIFI and network external connection, and connect to WIFI, 4G communication module or Ethernet through USB interface, so as to realize control and data transmission test; The image sensor acquires an image signal and transmits it to the image processor through the image signal input interface circuit; The expansion circuit also includes a low-power WIFI module circuit, which is connected to the image processor through an SPI communication interface. The low-power WIFI module circuit includes a third antenna interface, a low-power WIFI chip, a crystal oscillator, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor and a twenty-second capacitor. The second pin and the third pin of the third antenna interface are grounded. One end of the fifteenth resistor is connected to the first pin of the third antenna interface, and the other end is connected to the twentieth pin of the low-power WIFI chip. One end of the nineteenth capacitor is connected to the fifteenth resistor, and the other end is connected to the second pin and the third pin of the third antenna interface. One end of the eighteenth capacitor is connected to the nineteenth pin and the twenty-first pin of the low-power WIFI chip, and the other end is connected to the fifteenth resistor. One end of the 20th capacitor is connected to the sixteenth pin of the low-power WIFI chip. The seventeenth resistor and the eighteenth resistor are connected in series, one end is connected to the sixth pin of the low-power WIFI chip, and the other end is connected to the low-power WIFI The fourth pin of the chip, one end of the twenty-first capacitor is connected to the second pin of the low-power WIFI chip, and the other end is grounded, one end of the crystal oscillator is connected to the twenty-first capacitor, and the other end is connected to the first pin of the low-power WIFI chip, one end of the twenty-second capacitor is connected to the twenty-first capacitor, and the other end is grounded, one end of the seventeenth resistor is connected to the twenty-sixth pin of the low-power WIFI chip, and the other end is connected to the twenty-second capacitor, and the sixteenth resistor is connected to the twenty-sixth pin of the low-power WIFI chip.

2. The development board for expanding circuits according to claim 1, characterized in that: The network communication selection interface circuit includes an Ethernet output interface circuit, an SDIO-WIFI module antenna interface circuit and a USB-WIFI module antenna interface circuit. The Ethernet output interface circuit includes an Ethernet chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor. One end of the first resistor is connected to a 3.3v voltage, and the other end is connected to the 21st pin of the Ethernet chip. The 21st pin of the Ethernet chip is connected to the 88th pin of the image processor. One end of the second resistor is grounded, and the other end is connected to the 23rd pin of the Ethernet chip. One end of the first capacitor is grounded, and the other end is connected to the 21st pin of the Ethernet chip. One end of the second capacitor is connected to the 29th pin of the Ethernet chip, and the other end is connected to the third capacitor. One end of the third capacitor is connected to the Ethernet chip. The second pin of the Ethernet chip is connected to the other end, and the other end is grounded. The fourth capacitor is connected to the 30th pin of the Ethernet chip at one end, and the other end is connected to the 33rd pin of the Ethernet chip at the other end. The fourth resistor is grounded at one end, and the other end is connected to the first pin of the Ethernet chip. The fifth resistor is connected to the 3.3v voltage at one end, and the other end is connected to the 11th pin of the Ethernet chip. The seventh pin of the Ethernet chip is connected to the 30th pin of the Ethernet chip. The fifth capacitor is connected to the 30th pin of the Ethernet chip at one end, and the other end is connected to the 33rd pin of the Ethernet chip. The sixth capacitor is connected to the 14th pin of the Ethernet chip at one end, and the other end is connected to the fifth capacitor. The seventh capacitor is connected to the third resistor at one end, and the other end is connected to the sixth capacitor. The common end of the seventh capacitor and the third resistor is connected to 3.3v voltage, and the common end of the fifth capacitor and the sixth capacitor is grounded, one end of the third resistor is connected to the sixth capacitor, and the other end is connected to the 30th pin of the Ethernet chip, the 23rd pin of the Ethernet chip is connected to the fifth pin of the image processor, the 22nd pin of the Ethernet chip is connected to the fourth pin of the image processor, the 28th pin of the Ethernet chip is connected to the fifth pin of the image processor, and the 26th pin of the Ethernet chip is connected to the third pin of the image processor. The SDIO-WIFi module antenna interface circuit includes a WIFi chip, a plurality of first jumper caps, a first antenna interface, a sixth resistor, an eighth capacitor, a ninth capacitor and a tenth capacitor. One end of the sixth resistor is connected to the 11th pin of the WIFi chip, and the other end The first pin of the first antenna interface is connected to the first pin of the first antenna interface, the common end of the second pin and the third pin of the first antenna interface is grounded, the eighth capacitor and the tenth capacitor are connected in series, one end is connected to the first pin of the first antenna interface, and the other end is connected to the eighth pin of the WiFi chip, and the common end of the eighth capacitor and the tenth capacitor is connected to the second pin and the third pin of the first antenna interface, one end of the ninth capacitor is connected to the sixth resistor, and the other end is connected to the eleventh pin of the WiFi chip, the first pin, the second pin, the third pin, the fifth pin, the sixth pin and the seventh pin of the WiFi chip are respectively connected to the ninth pin, the tenth pin, the eighth pin, the sixth pin, the first pin and the second pin of the image processor through a plurality of the first jumper caps, and the USB-WIFI The module antenna interface circuit includes a seventh resistor, a USB-WIFI driver chip, a second antenna interface, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor and a fourteenth capacitor. One end of the seventh resistor is connected to the first pin of the USB-WIFI driver chip, and the other end is connected to the first pin of the second antenna interface. One end of the thirteenth capacitor is connected to the seventh resistor, and the other end is connected to the second pin and the third pin of the second antenna interface. One end of the fourteenth capacitor is connected to the first pin of the second antenna interface, and the other end is grounded. One end of the eleventh capacitor is grounded, and the other end is connected to the eleventh pin of the USB-WIFI driver chip. One end of the twelfth capacitor is connected to the eleventh pin of the USB-WIFI driver chip, and the other end is connected to the eleventh capacitor. The thirteenth pin of the USB-WIFI driver chip is connected to the fifty-fifth pin of the image processor, and the twelfth pin of the USB-WIFI driver chip is connected to the fifty-fourth pin of the image processor. .

3. The development board for expanding the circuit according to claim 2, characterized in that: The development board for expanding the circuit also includes a network port transformer output interface circuit, which is connected to the Ethernet output interface circuit. The network port transformer output interface circuit includes a network port transformer, a network interface, a first transient diode, a second transient diode, a third transient diode, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth capacitor, a sixteenth capacitor and a seventeenth capacitor. The ninth pin and the tenth pin of the network interface are grounded. One end of the thirteenth resistor is connected to the fourth pin and the fifth pin of the network interface, and the other end is connected to the fifteenth pin of the network port transformer. One end of the twelfth resistor is connected to the seventh pin and the eighth pin of the network interface, and the other end is connected to the thirteenth resistor. One end of the tenth resistor is connected to the third pin of the network port transformer, and the other end is connected to the fourth pin of the Ethernet chip. One end of the ninth resistor is connected to the network port transformer The first pin of the Ethernet chip is connected to the first pin of the network port transformer at one end, and the other end is connected to the third pin of the Ethernet chip; the first transient diode is connected to the first pin of the network port transformer at one end, and the other end is connected to the third pin of the network port transformer; the second transient diode is connected to the sixth pin of the network port transformer at one end, and the other end is connected to the eighth pin of the network port transformer at the other end; the third transient diode is connected to the fifteenth pin of the network port transformer at one end, and the other end is grounded; the fifteenth capacitor is grounded at one end, and the other end is connected to the second pin of the network port transformer; the sixteenth capacitor is grounded at one end, and the other end is connected to the seventh pin of the network port transformer; the eighth resistor is connected in series with the seventeenth capacitor, one end is connected to the third transient diode, and the other end is connected to the tenth pin of the network port transformer; the eleventh resistor is connected to the second transient diode at one end, and the other end is connected to the sixth pin of the Ethernet chip; the fourteenth resistor is connected to the sixth pin of the network port transformer at one end, and the other end is connected to the fifth pin of the Ethernet chip.

4. The development board for expanding circuits according to claim 1, characterized in that: The development board for expanding the circuit also includes a low-power WIFI power supply circuit, which is electrically connected to the low-power WIFI module circuit. The low-power WIFI power supply circuit includes a power supply chip, a first inductor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor and a switch. The third pin of the power supply chip is connected to the low-power WIFI module circuit. The fourth pin of the chip is connected to the fifth pin, the twenty-third capacitor is connected in parallel with the twenty-fourth capacitor, one end of which is grounded and the other end is connected to the third pin of the power supply chip, the 20th resistor is connected in parallel with the twenty-fifth capacitor, one end of which is connected to the third pin of the power supply chip and the other end is connected to the fifth pin of the power supply chip, the nineteenth resistor is connected to the fifth pin of the power supply chip at one end and the other end is grounded, the twenty-second resistor, the switch and the twenty-first resistor are connected in series, one end of which is connected to the fourth pin of the power supply chip and the other end is connected to the second pin of the power supply chip, the second pin of the power supply chip is grounded, the first pin of the power supply chip is connected to the twenty-first resistor, the twenty-seventh capacitor and the twenty-sixth capacitor are connected in parallel, one end of which is connected to the fourth pin of the power supply chip and the other end is grounded.

5. The development board for expanding circuits according to claim 1, characterized in that: The development board for expanding the circuit also includes a human infrared detection circuit and a human infrared detection power supply circuit, which are electrically connected to the human infrared detection circuit. The human infrared detection circuit includes an infrared sensor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor and a twenty-eighth capacitor. The third pin of the human infrared detection power supply circuit is connected to the ninth pin of the low-power WIFI chip, the fifth pin of the human infrared detection power supply circuit is connected to the sixth pin of the infrared sensor, the twenty-third resistor and the twenty-fourth resistor are connected in series, one end of which is connected to the fifth pin of the human infrared detection power supply circuit, and the other end is grounded, the sixth pin of the external sensor is connected to the common end of the twenty-third resistor and the twenty-fourth resistor, the twenty-sixth resistor, the twenty-seventh resistor and the twenty-fifth resistor are connected in series, one end is connected to the second pin of the infrared sensor, and the other end is grounded, the twenty-eighth capacitor is connected to the twenty-fifth resistor at one end, and the other end is connected to the twenty-seventh resistor at the other end, and the fifth pin of the infrared sensor is connected to the eighth pin of the low-power WIFI chip.

6. The development board for expanding circuits according to claim 1, characterized in that: The development board for expanding the circuit also includes a filter switching drive circuit, which is connected to the image processor through a plurality of second jumper caps. The filter switching drive circuit includes a filter switching driver, a 2P interface, a 29th resistor and a 30th resistor. The third pin of the filter switching driver is connected to the 84th pin of the image processor through the second jumper cap, one end of the 29th resistor is connected to the fifth pin of the filter switching driver and the other end is connected to the third pin and the fourth pin of the 2P interface are grounded, the second pin of the 2P interface is connected to the sixth pin of the filter switching driver, the first pin of the 2P interface is connected to the first pin of the filter switching driver, and the 30th resistor is connected to the first pin of the 2P interface at one end and the first pin of the filter switching driver at the other end.

7. The development board for expanding circuits according to claim 1, characterized in that: The development board for expanding the circuit also includes a human shape detection module interface circuit and a human shape detection module interface power supply circuit, the human shape detection module interface circuit and the human shape detection module interface power supply circuit are electrically connected, and the third pin of the human shape detection module interface power supply circuit is connected to the twenty-fifth pin of the low-power WIFI chip.

8. The development board for expanding circuits according to claim 1, characterized in that: The development board for expanding the circuit also includes a storage circuit, which is connected to the image processor. The storage circuit includes a storage chip and a thirty-first capacitor. The seventh pin of the storage chip is connected to the sixty-first pin of the image processor, the fifth pin of the storage chip is connected to the sixty-seventh pin of the image processor, the ninth pin of the storage chip is connected to the sixty-seventh pin of the image processor, and the third pin of the storage chip is connected to the sixty-sixth pin of the image processor.

9. The development board for expanding a circuit as claimed in claim 1, characterized in that: The development board for expanding the circuit also includes a power supply circuit, which includes a power input circuit, a charging protection circuit and a power circuit, and the power input circuit, the charging protection circuit and the power circuit are respectively connected to the image processor.

Images