A control circuit board for a remote control toy

Abstract

The utility model relates to electronic remote control technical field, and specifically disclose a control circuit board for remote control toy, through radio frequency front end module U1's data output pin DOUT directly with SOC host module U2's general input pin GPIO electricity is connected, because SOC host module U2 in fixed with EV1527 decoding software and can capture signal pulse width, can thus directly to the signal that radio frequency front end module U1 sent decodes and handles through SOC host module U2, and from SOC host module U2's level output pin PB0 and level output pin PB1 direct output to motor drive module U3 correct discernment's logic level of signal, and directly connect to its logic control input pin IN1 and logic control input pin IN2, realize motor drive module U3 to motor positive and negative rotation and the control of stop. The utility model in no longer use prior art's hardware decoding chip, reduced the number of electronic components, greatly reduced the cost, also reduced the occupation area of PCB board.

Description

Technical Field

[0001] This utility model relates to the field of electronic remote control technology, and in particular to a control circuit board for remote control toys. Background Technology

[0002] Currently, in 315MHz band toy remote control products, the receiver typically has an RF receiver chip (such as VI521R or RX5808). This conventional RF receiver chip is mainly responsible for receiving the wireless signal transmitted from the remote control (i.e., the transmitter), processing the received signal, and sending the processed signal to a subsequent decoding chip, usually a dedicated hardware decoding chip, such as the SC2272 or HS1527 from the EV1527 series. The hardware decoding chip performs address code comparison and data decoding on the received signal, and sends the decoded signal to the main control chip. The main control chip then performs level conversion on the received signal and sends it to the motor driver chip, which ultimately controls the motor's forward and reverse rotation and stops. However, the above existing technology has the following drawbacks: a large number of components, high cost, and a large PCB area required. Utility Model Content

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a control circuit board for remote control toys that has fewer components, lower cost and occupies less PCB area.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a control circuit board for remote-controlled toys, comprising a receiver circuit, which includes an RF front-end module U1, a SOC main control module U2 containing EV1527 decoding software and capable of capturing signal pulse width, and a motor drive module U3. The SOC main control module U2 has general-purpose input pins GPIO, level output pins PB0 and PB1, and the RF front-end module U1 has a data output pin DOUT. The motor drive module U3 has logic control input pins IN1 and IN2, and a motor drive output pin OU. T1, motor drive output pin OUT2, the data output pin DOUT of the RF front-end module U1 is electrically connected to the general-purpose input pin GPIO of the SOC main control module U2, the level output pin PB1 of the SOC main control module U2 is electrically connected to the logic control input pin IN1 of the motor drive module U3, the level output pin PB0 of the SOC main control module U2 is electrically connected to the logic control input pin IN2 of the motor drive module U3, and the motor drive output pins OUT1 and OUT2 of the motor drive module U3 are both electrically connected to the motor.

[0006] The control circuit board for remote-controlled toys described in this invention has its data output pin DOUT of the RF front-end module U1 directly connected to the general-purpose input pin GPIO of the SOC main control module U2. Since the SOC main control module U2 contains EV1527 decoding software and can capture signal pulse widths, it can directly decode the signals sent from the RF front-end module U1. The signals are then directly output from the level output pins PB0 and PB1 of the SOC main control module U2 to the logic level that the motor drive module U3 can correctly recognize, and directly connected to its logic control input pins IN1 and IN2, enabling the motor drive module U3 to control the forward and reverse rotation and stop of the motor. This invention eliminates the use of existing hardware decoding chips, reducing the number of electronic components, significantly lowering costs, and also reducing the PCB board area occupied.

[0007] Furthermore, the model number of the SOC main control module U2 is PY32F002BL15S7TU.

[0008] Furthermore, the RF front-end module U1 is provided with an antenna interface pin ANT, which is electrically connected to an external receiving antenna; a capacitor C1 is provided between the antenna interface pin ANT and the receiving antenna; an inductor L2 is connected between the capacitor C1 and the antenna interface pin ANT, with one end of the inductor L2 connected between the capacitor C1 and the antenna interface pin ANT and the other end grounded; an inductor L1 is connected between the capacitor C1 and the receiving antenna, with one end of the inductor L1 connected between the capacitor C1 and the receiving antenna and the other end grounded.

[0009] Furthermore, a capacitor C2 is also provided between the capacitor C1 and the receiving antenna. The capacitor C2 is connected in parallel with the inductor L1. One end of the capacitor C2 is connected between the capacitor C1 and the receiving antenna, and the other end is grounded.

[0010] Furthermore, the capacitance value of capacitor C1 is 3pF, the capacitance value of capacitor C2 is 4.7pF, the inductance value of inductor L1 is 47nH, and the inductance value of inductor L2 is 68nH.

[0011] Furthermore, the RF front-end module U1 is also provided with a crystal oscillator connection pin XI, which is electrically connected to a crystal oscillator X1, and the frequency of the crystal oscillator X1 is 9.81563MHz.

[0012] Furthermore, the RF front-end module U1 is also provided with a first power supply pin VDD, a resistor R1 is connected to the first power supply pin VDD, and a capacitor C3 is connected between the resistor R1 and the first power supply pin VDD. One end of the capacitor C3 is connected between the resistor R1 and the first power supply pin VDD, and the other end is grounded.

[0013] Furthermore, the radio frequency front-end module U1 is also provided with a carrier detection threshold setting pin CTH, and a capacitor C4 is connected to the carrier detection threshold setting pin CTH when powered on.

[0014] Furthermore, the motor drive module U3 is provided with a second power supply pin P5, and the control circuit board for the remote control toy also includes capacitors C7 and C8, which are connected in parallel and the parallel circuit formed is connected to the second power supply pin P5 of the motor drive module U3.

[0015] Furthermore, the RF front-end module U1 is model number VI521R, and the motor drive module U3 is model number FM116C. Attached Figure Description

[0016] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0017] Figure 1 This is a schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0019] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] This utility model specifically provides an embodiment of a control circuit board for remote-controlled toys, see [link to embodiment]. Figure 1The invention includes a receiver circuit, comprising an RF front-end module U1, an SOC main control module U2 containing EV1527 decoding software, and a motor drive module U3 capable of capturing signal pulse width. The SOC main control module U2 is model PY32F002BL15S7TU, developed and manufactured by Puran Semiconductor (Shanghai) Co., Ltd., belonging to the PY32F002B series. This chip has general-purpose input pins (GPIO), thus providing GPIO input functionality for reading RF signal level changes. It also features timer or interrupt functions to accurately capture signal pulse width. This allows the EV1527 decoding program from hardware decoding chips such as SC2272 or HS1527 to be transferred to the SOC main control module U2 (model PY32F002BL15S7TU), directly enabling the SOC main control module U2 to have decoding capabilities. Therefore, this invention does not involve modifications to the EV1527 decoding software. The 527 decoding software is existing technology and is not the inventive point of this utility model. The SOC main control module U2 has a general-purpose input pin GPIO, a level output pin PB0, and a level output pin PB1. The RF front-end module U1 has a data output pin DOUT. The motor drive module U3 has logic control input pins IN1 and IN2, motor drive output pins OUT1 and OUT2. The data output pin DOUT of the RF front-end module U1 is electrically connected to the general-purpose input pin GPIO of the SOC main control module U2. The level output pin PB1 of the SOC main control module U2 is electrically connected to the logic control input pin IN1 of the motor drive module U3. The level output pin PB0 of the SOC main control module U2 is electrically connected to the logic control input pin IN2 of the motor drive module U3. The motor drive output pins OUT1 and OUT2 of the motor drive module U3 are both electrically connected to the motor. In this embodiment, the RF front-end module U1 is model VI521R, and the motor drive module U3 is model FM116C.The RF front-end module U1 receives 315MHz RF signals, performs automatic gain control, demodulates, and outputs a TTL-level EV1527 waveform. This waveform is then sent to the SOC main control module U2 via the data output pin DOUT and the general purpose input pin GPIO. The SOC main control module U2 decodes the received signal and sends the decoded signal to the motor drive module U3 via the level output pins PB0 and PB1. Finally, the motor drive module U3 controls the motor to rotate forward, reverse, or stop. Because the decoding and transmission are performed by the SOC main control module U2, level conversion is unnecessary, saving the number of hardware decoding chips and other electronic components. This significantly reduces the cost of the control circuit board and the space occupied on the PCB. In addition, it reduces intermediate links and potential failure points in signal transmission, eliminates signal delay and distortion, and greatly improves the system's response speed and overall reliability.

[0022] In a preferred embodiment, the RF front-end module U1 has an antenna interface pin ANT, which is electrically connected to an external receiving antenna. A capacitor C1 is placed between the antenna interface pin ANT and the receiving antenna. An inductor L2 is connected between the capacitor C1 and the antenna interface pin ANT, with one end of the inductor L2 connected between the capacitor C1 and the antenna interface pin ANT and the other end grounded. Another inductor L1 is connected between the capacitor C1 and the receiving antenna, with one end of the inductor L1 connected between the capacitor C1 and the receiving antenna and the other end grounded. This circuit structure not only achieves impedance matching but also provides bandpass filtering. At a frequency of 315MHz, the impedance presented minimizes the signal path impedance from the chip to the antenna, allowing energy to pass through most smoothly. Simultaneously, for other frequency signals (noise or harmonics) far from 315MHz, a high impedance is presented, effectively suppressing them, reducing interference to other devices, and improving its own anti-interference capability.

[0023] In a preferred embodiment, a capacitor C2 is further provided between capacitor C1 and the receiving antenna. Capacitor C2 is connected in parallel with inductor L1, with one end of capacitor C2 connected between capacitor C1 and the receiving antenna, and the other end grounded. By providing capacitor C2, a precise capacitive load can be provided to the crystal oscillator connection pin to start and maintain a stable oscillation.

[0024] In a preferred embodiment, capacitor C1 has a capacitance of 3pF, capacitor C2 has a capacitance of 4.7pF, inductor L1 has an inductance of 47nH, and inductor L2 has an inductance of 68nH. The specific capacitance value of capacitor C2 allows for precise calibration of the oscillation frequency to the required 9.81563MHz, ensuring accurate operation at a frequency of 315MHz. By setting specific values ​​for capacitors C1, L1, and L2, efficient transmission of radio frequency energy from the chip to the antenna can be achieved, ensuring the system operates at the correct 315MHz frequency.

[0025] In a preferred embodiment, the RF front-end module U1 further includes a crystal oscillator connection pin XI, which is electrically connected to a crystal oscillator X1 with a frequency of 9.81563MHz. This ensures that the carrier frequencies for transmission and reception are strictly aligned to 315MHz, and that the crystal oscillator frequency is minimally affected by temperature and time drift, guaranteeing that the communication frequency remains stable throughout the entire operating temperature range and product lifespan, ensuring a reliable communication link.

[0026] In a preferred embodiment, the RF front-end module U1 further includes a first power supply pin VDD, to which a resistor R1 is connected. A capacitor C3 is connected between the resistor R1 and the first power supply pin VDD, with one end of the capacitor C3 connected between the resistor R1 and the first power supply pin VDD, and the other end grounded. The resistor R1 blocks the passage of high-frequency noise, while the capacitor C3 provides a low-impedance discharge path to ground for this blocked high-frequency noise, ensuring the stable operation of the RF front-end module U1.

[0027] In a preferred embodiment, the RF front-end module U1 further includes a carrier detection threshold setting pin CTH, on which a capacitor C4 is connected. Connecting capacitor C4 between the carrier detection threshold setting pin CTH and ground can filter out high-frequency fluctuations and noise on the threshold voltage, forming a stable voltage.

[0028] In a preferred embodiment, the motor drive module U3 has a second power supply pin P5. The control circuit board for the remote control toy also includes capacitors C7 and C8, which are connected in parallel, and the resulting parallel circuit is connected to the second power supply pin P5 of the motor drive module U3. Capacitor C7 suppresses high-frequency noise and protects the motor drive module U3, while capacitor C8 provides a large instantaneous current and maintains a stable power supply voltage.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control circuit board for a remote-controlled toy, comprising a receiver circuit, characterized in that: The receiving circuit includes an RF front-end module U1, a SOC main control module U2 containing EV1527 decoding software and capable of capturing signal pulse width, and a motor drive module U3. The SOC main control module U2 has a general-purpose input pin GPIO, a level output pin PB0, and a level output pin PB1. The RF front-end module U1 has a data output pin DOUT. The motor drive module U3 has logic control input pins IN1 and IN2, a motor drive output pin OUT1, and a motor drive output pin OUT2. The data output pin DOUT of the RF front-end module U1 is electrically connected to the general-purpose input pin GPIO of the SOC main control module U2. The level output pin PB1 of the SOC main control module U2 is electrically connected to the logic control input pin IN1 of the motor drive module U3. The level output pin PB0 of the SOC main control module U2 is electrically connected to the logic control input pin IN2 of the motor drive module U3. The motor drive output pins OUT1 and OUT2 of the motor drive module U3 are both electrically connected to the motor.

2. The control circuit board for remote-controlled toys according to claim 1, characterized in that: The model number of the SOC main control module U2 is PY32F002BL15S7TU.

3. The control circuit board for remote-controlled toys according to claim 1 or 2, characterized in that: The RF front-end module U1 is provided with an antenna interface pin ANT, which is electrically connected to an external receiving antenna. A capacitor C1 is provided between the antenna interface pin ANT and the receiving antenna. An inductor L2 is connected between the capacitor C1 and the antenna interface pin ANT, with one end of the inductor L2 connected between the capacitor C1 and the antenna interface pin ANT and the other end grounded. An inductor L1 is also connected between the capacitor C1 and the receiving antenna, with one end of the inductor L1 connected between the capacitor C1 and the receiving antenna and the other end grounded.

4. The control circuit board for remote-controlled toys according to claim 3, characterized in that: A capacitor C2 is also provided between the capacitor C1 and the receiving antenna. The capacitor C2 is connected in parallel with the inductor L1. One end of the capacitor C2 is connected between the capacitor C1 and the receiving antenna, and the other end is grounded.

5. The control circuit board for remote-controlled toys according to claim 4, characterized in that: The capacitance of capacitor C1 is 3pF, the capacitance of capacitor C2 is 4.7pF, the inductance of inductor L1 is 47nH, and the inductance of inductor L2 is 68nH.

6. The control circuit board for remote-controlled toys according to claim 3, characterized in that: The radio frequency front-end module U1 is also provided with a crystal oscillator connection pin XI, which is electrically connected to a crystal oscillator X1, and the frequency of the crystal oscillator X1 is 9.81563MHz.

7. The control circuit board for remote-controlled toys according to claim 1 or 2, characterized in that: The radio frequency front-end module U1 is also provided with a first power supply pin VDD. A resistor R1 is connected to the first power supply pin VDD. A capacitor C3 is connected between the resistor R1 and the first power supply pin VDD. One end of the capacitor C3 is connected between the resistor R1 and the first power supply pin VDD, and the other end is grounded.

8. The control circuit board for remote-controlled toys according to claim 1 or 2, characterized in that: The radio frequency front-end module U1 is also provided with a carrier detection threshold setting pin CTH, and a capacitor C4 is connected to the carrier detection threshold setting pin CTH when it is powered on.

9. The control circuit board for remote-controlled toys according to claim 1 or 2, characterized in that: The motor drive module U3 is provided with a second power supply pin P5. The control circuit board for the remote control toy also includes capacitors C7 and C8. The capacitors C7 and C8 are connected in parallel, and the parallel circuit formed is connected to the second power supply pin P5 of the motor drive module U3.

10. The control circuit board for remote-controlled toys according to claim 1 or 2, characterized in that: The RF front-end module U1 is model number VI521R, and the motor drive module U3 is model number FM116C.

Images