Single-chip microcomputer expansion board

Abstract

The utility model discloses a single-chip microcomputer expansion board which comprises an expansion board body, a nano single-chip microcomputer is installed in the middle of the top end of the expansion board body, two USB power output circuits which are symmetrically arranged are fixedly installed on one side of the top end of the expansion board body, and a PCB circuit located on one side of the nano single-chip microcomputer is fixedly installed on the expansion board body. A PCB circuit is fixedly installed on one side of the top end of the expansion board body, an external power source circuit is fixedly installed on the other side of the top end of the expansion board body, an io power source connecting wire located on one side of the external power source circuit is fixedly installed on the expansion board body, and the external power source circuit is connected with a nano single-chip microcomputer. According to the arduino power supply device, the system stability of the arduino is not caused, a plurality of electric appliance circuits such as a Usb port and an io port are integrated into one circuit, the problems of bloated wiring, mutual interference of the circuits and the like are avoided, and hardware support can be provided for design and manufacturing of arduino works needing to be connected with a plurality of large-current power supply devices.

Description

TECHNICAL FIELD

[0001] The utility model relates to singlechip technology field, concretely is a kind of singlechip extension board. BACKGROUND

[0002] The size of Arduino Nano is only 18x45 mm, which is very suitable for use in space-limited environments. Compared with other Arduino development boards, the size of Nano is reduced by about 75%, which makes it easy to integrate into various small devices and projects. It is powerful, despite its small size, Arduino Nano is very powerful. It is based on ATmega328P microcontroller, providing 14 digital I / O pins and 8 analog input pins, meeting the needs of most basic projects. In addition, it also supports PWM, SPI and I2C communication protocols, suitable for various complex control logic. Arduino Nano can be directly connected to the computer through USB interface without additional programmer. It can be powered through USB or external power supply through power pin. It is very flexible to use. In addition, Arduino Nano is compatible with Arduino IDE, making programming and debugging simple and easy. It is suitable for battery-powered portable projects, especially for devices that need to run for a long time.

[0003] However, the traditional singlechip has the following shortcomings:

[0004] The upper limit of the power supply of the external appliance of the Arduino nano singlechip itself is only 500mA, which makes the user of this singlechip have many restrictions when connecting components, especially when connecting motors, speakers and other devices with high current requirements. The system may crash due to insufficient current supply of the singlechip itself, especially when the singlechip usb port is connected to the computer. This situation is particularly serious, and sometimes it may damage the connected computer hardware. The previous solution is to set up additional power supply and wiring for each power consumer, which causes wiring confusion, poor system stability, bulky experimental equipment and other problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a singlechip extension board to solve the Arduino nano singlechip's external power supply upper limit of 500mA in the background art, which limits the use of the singlechip, especially when connecting devices requiring large current, such as motors and speakers.

[0006] To achieve the above object, the utility model provides the following technical scheme: a singlechip extension board, including extension board main part, the middle part of the top of extension board main part is installed with nano singlechip, one side of the top of extension board main part is fixedly installed with two symmetrical USB power output circuits, the PCB circuit of one side of nano singlechip is fixedly installed on the extension board main part, the other side of the top of extension board main part is fixedly installed with external power supply circuit, the io power supply wiring of one side of external power supply circuit is fixedly installed on the extension board main part, the external power supply circuit is connected with nano singlechip, and the nano singlechip, io power supply wiring and two USB power output circuits are connected with PCB circuit.

[0007] Preferably, the PCB circuit includes chip U4, capacitor C1, diode D1, inductor U3 and capacitor C2, one end of the inductor U3 and one end of the capacitor C2 are connected to the 4 pin of the chip U4 respectively, one end of the diode D1 and the other end of the inductor U3 are connected to the 2 pin of the chip U4 respectively, one end of the capacitor C1 is connected to the 1 pin of the chip U4, the 5 pin of the chip U4, the 3 pin of the chip U4, the other end of the capacitor C1, the other end of the diode D1 and the other end of the capacitor C2 are grounded.

[0008] Preferably, the nano singlechip is provided with chip U1, the 6 pin of the chip U1 is A2, the 7 pin of the chip U1 is A3, the 8 pin of the chip U1 is A4, the 9 pin of the chip U1 is A5, the 23 pin of the chip U1 is D5, the 22 pin of the chip U1 is D4, the 21 pin of the chip U1 is D3, the 20 pin of the chip U1 is D2, and the 19 pin of the chip U1 and the 14 pin of the chip U1 are grounded.

[0009] Preferably, the io power wiring is internally provided with pin header H5, pin header H6, pin header H7, pin header H8, pin header H9 and pin header H10, the 1 end pin of the pin header H5 is connected with A2, the 2 end pin of the pin header H5 is connected with A3, the 3 end pin of the pin header H5 is connected with A4, the 4 end pin of the pin header H5 is connected with A5, the 1 end pin of the pin header H6 is connected with D2, the 2 end pin of the pin header H6 is connected with D3, the 3 end pin of the pin header H6 is connected with D4, the 4 end pin of the pin header H6 is connected with D5, the 1 end pin of the pin header H9, the 2 end pin of the pin header H9, the 3 end pin of the pin header H9, the 4 end pin of the pin header H9, the 1 end pin of the pin header H10, the 2 end pin of the pin header H10, the 3 end pin of the pin header H10 and the 4 end pin of the pin header H10 are all grounded.

[0010] Preferably, the USB power output circuit is internally provided with USB1 and USB2, the 1 end pin of the USB1 and the 1 end pin of the USB2 are both connected with +5V power supply, and the 4 end pin of the USB1 and the 4 end pin of the USB2 are both grounded.

[0011] Preferably, the external power supply circuit comprises pin header H4 and pin header H11, the 1 end pin of the pin header H4 is connected with 12V power supply, and the 1 end pin of the pin header H11 is grounded.

[0012] Compared with the prior art, the utility model has the advantages that: through the setting of the PCB circuit, the power supply end of the electric appliance is not used, the system of the arduino itself is not unstable, the Usb, the io port and other multi-path electric appliance circuits are integrated into one circuit, the problems of bulky wiring and mutual interference of circuits are avoided, and hardware support can be provided for the design and production of arduino works which need to be connected with multiple large-current power supply devices. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the side view of the utility model expansion board main part;

[0014] Figure 2 It is the circuit diagram of the utility model PCB circuit;

[0015] Figure 3 It is the circuit diagram of the utility model nanno single-chip microcomputer;

[0016] Figure 4 It is the circuit diagram of the utility model io power wiring;

[0017] Figure 5 It is the circuit diagram of the utility model USB power output circuit;

[0018] Figure 6 It is the circuit diagram of the utility model external power supply.

[0019] In the figure: 1, extension board main body; 2, USB power output circuit; 3, nano single-chip microcomputer; 4, io power connection; 5, external power supply circuit; 6, PCB circuit. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0021] Please refer to Figures 1-6 The utility model provides a single-chip microcomputer extension board, including extension board main body 1, the middle part of extension board main body 1 top is installed with nano single-chip microcomputer 3, one side fixed mounting of extension board main body 1 top is equipped with two symmetrical USB power output circuit 2, the PCB circuit 6 of being located nano single-chip microcomputer 3 one side is fixedly installed on extension board main body 1, the other side fixed mounting of extension board main body 1 top is equipped with external power supply circuit 5, the io power connection 4 of being located external power supply circuit 5 one side is fixedly installed on extension board main body 1, external power supply circuit 5 is connected with nano single-chip microcomputer 3, and nano single-chip microcomputer 3 and io power connection 4, two USB power output circuit 2 all are connected with PCB circuit 6.

[0022] PCB circuit 6 includes chip U4, capacitor C1, diode D1, inductor U3 and capacitor C2, and the 4 end pin of chip U4 is connected with one end of inductor U3 and one end of capacitor C2 respectively, and the 2 end pin of chip U4 is connected with one end of diode D1 and the other end of inductor U3 respectively, and the 1 end of chip U4 is connected with one end of capacitor C1, and the 5 end pin of chip U4, the 3 end pin of chip U4, the other end of capacitor C1, the other end of diode D1 and the other end of capacitor C2 are all grounded.

[0023] Chip U1 is arranged in nano single-chip microcomputer 3, and the 6 end pin of chip U1 is A2, the 7 end pin of chip U1 is A3, the 8 end pin of chip U1 is A4, the 9 end pin of chip U1 is A5, the 23 end pin of chip U1 is D5, the 22 end pin of chip U1 is D4, the 21 end pin of chip U1 is D3, the 20 end pin of chip U1 is D2, and the 19 end pin of chip U1 and the 14 end pin of chip U1 are all grounded.

[0024] The io power supply wiring 4 is provided with the pinout H5, the pinout H6, the pinout H7, the pinout H8, the pinout H9 and the pinout H10, the 1 end pin of the pinout H5 is connected with A2, the 2 end pin of the pinout H5 is connected with A3, the 3 end pin of the pinout H5 is connected with A4, the 4 end pin of the pinout H5 is connected with A5, the 1 end pin of the pinout H6 is connected with D2, the 2 end pin of the pinout H6 is connected with D3, the 3 end pin of the pinout H6 is connected with D4, the 4 end pin of the pinout H6 is connected with D5, the 1 end pin of the pinout H9, the 2 end pin of the pinout H9, the 3 end pin of the pinout H9, the 4 end pin of the pinout H9, the 1 end pin of the pinout H10, the 2 end pin of the pinout H10, the 3 end pin of the pinout H10 and the 4 end pin of the pinout H10 are all grounded.

[0025] The USB power output circuit 2 is provided with USB1 and USB2, the 1 end pin of the USB1 and the 1 end pin of the USB2 are both connected with +5V power supply, the 4 end pin of the USB1 and the 4 end pin of the USB2 are both grounded.

[0026] The external power supply circuit 5 includes the pinout H4 and the pinout H11, the 1 end pin of the pinout H4 is connected with 12V power supply, the 1 end pin of the pinout H11 is grounded.

[0027] In use, the parallel circuit input 8.4v power supply is adopted to independently supply power for the arduino and the components and devices related thereto, so that the two sides will not interfere with each other, the arduino is directly supplied with 8.4v independent power supply, the voltage output end of the electrical appliance is reduced to 5V through the voltage stabilizing module LM2596T to supply power for the electrical appliance connected with the arduino, the electrical appliance does not use the power supply end of the arduino, and the system of the arduino itself will not be unstable, the USB, the io port and other multi-path electrical appliance circuits are integrated into one circuit, the problems such as cumbersome connection and mutual interference of circuits are avoided, the hardware support can be provided for the arduino work design and production which needs to connect multiple large-current power supply devices, and the circuit prototype machine produced can effectively drive the USB sound, four 5v motors and the single-chip microcomputer at the same time, only one external power supply line of the circuit board is needed, the trouble of connecting multiple external power supplies is avoided, and the design can stably run in the situation that the arduino single-chip microcomputer drives multiple high-power electrical appliances.

[0028] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A single-chip computer expansion board comprising an expansion board body (1), characterized in that: The middle part of the top end of the extension board body (1) is provided with a nano single-chip microcomputer (3), one side of the top end of the extension board body (1) is fixedly provided with two symmetrically arranged USB power output circuits (2), the extension board body (1) is fixedly provided with a PCB circuit (6) on the side of the nano single-chip microcomputer (3), the other side of the top end of the extension board body (1) is fixedly provided with an external power supply circuit (5), the extension board body (1) is fixedly provided with an io power supply wiring (4) on the side of the external power supply circuit (5), the external power supply circuit (5) is connected with the nano single-chip microcomputer (3), and the nano single-chip microcomputer (3), the io power supply wiring (4) and the two USB power output circuits (2) are connected with the PCB circuit (6).

2. The single-chip microcomputer expansion board according to claim 1, characterized by: The PCB circuit (6) comprises a chip U4, a capacitor C1, a diode D1, an inductor U3 and a capacitor C2, one end of the inductor U3 and one end of the capacitor C2 are connected with the 4 pin of the chip U4 respectively, one end of the diode D1 and the other end of the inductor U3 are connected with the 2 pin of the chip U4 respectively, one end of the capacitor C1 is connected with the 1 pin of the chip U4, and the 5 pin of the chip U4, the 3 pin of the chip U4, the other end of the capacitor C1, the other end of the diode D1 and the other end of the capacitor C2 are grounded.

3. The single-chip microcomputer expansion board according to claim 1, characterized by: The nano single-chip microcomputer (3) is provided with a chip U1, the 6 pin of the chip U1 is A2, the 7 pin of the chip U1 is A3, the 8 pin of the chip U1 is A4, the 9 pin of the chip U1 is A5, the 23 pin of the chip U1 is D5, the 22 pin of the chip U1 is D4, the 21 pin of the chip U1 is D3, the 20 pin of the chip U1 is D2, and the 19 pin of the chip U1 and the 14 pin of the chip U1 are grounded.

4. The single-chip microcomputer expansion board according to claim 1, characterized by: The io power supply wiring (4) is provided with a row of pins H5, a row of pins H6, a row of pins H7, a row of pins H8, a row of pins H9 and a row of pins H10, the 1 pin of the row of pins H5 is connected with A2, the 2 pin of the row of pins H5 is connected with A3, the 3 pin of the row of pins H5 is connected with A4, the 4 pin of the row of pins H5 is connected with A5, the 1 pin of the row of pins H6 is connected with D2, the 2 pin of the row of pins H6 is connected with D3, the 3 pin of the row of pins H6 is connected with D4, the 4 pin of the row of pins H6 is connected with D5, and the 1 pin of the row of pins H9, the 2 pin of the row of pins H9, the 3 pin of the row of pins H9, the 4 pin of the row of pins H9, the 1 pin of the row of pins H10, the 2 pin of the row of pins H10, the 3 pin of the row of pins H10 and the 4 pin of the row of pins H10 are grounded.

5. The single-chip microcomputer expansion board according to claim 1, characterized by: The USB power output circuit (2) is provided with USB1 and USB2, the 1 pin of the USB1 and the 1 pin of the USB2 are both connected with a +5V power supply, and the 4 pin of the USB1 and the 4 pin of the USB2 are grounded.

6. The single-chip microcomputer expansion board according to claim 1, characterized by: The external power supply circuit (5) comprises a row of pins H4 and a row of pins H11, the 1 pin of the row of pins H4 is connected with a 12V power supply, and the 1 pin of the row of pins H11 is grounded.

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