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Specifications
(1) External voltage: DC6.5-12.6V, anti-reverse connection
(2) 5V power supply: use AMS1117-5V, maximum 1A current
(3) Motor drive chip: L298P, input DC6.5-12.6V, output total current up to 4A
(4) 6-axis sensor: MPU6050 gyroscope and acceleration chip
(5) Interface: XH2.54 connector, 2.54mm pin header
(6) wifi interface power supply: use AMS1117-3.3V, maximum 1A current
(7) Compatible motherboard: can be directly inserted into arduino UNO R3
Description of Silkscreen
M1\ M2 interface：Can be connected to DC6.5-12.6V motor, commonly used in ordinary robot motors.
J2 interface：J2 interface is used for the motor with the code wheel. It is often used to drive the motor of the balance car, as defined below. M2+\- is the A-channel motor drive output of L298P, GND is logic ground, D2\D5 is connected to 2\5 pin of UNO R3, VCC is connected to 5V power supply of balance car drive shield.
J3 interface：J2 interface is used for the motor with the code wheel. It is often used to drive the motor of the balance car, as defined below. M1+\-is the B-channel motor drive output of L298P, GND is logic ground, D3\D4 is connected to 2\5 pin of UNO R3, VCC is connected to 5V power supply of balance car drive shield.
4 G\V\A0 interface：Equal to UNO R3 A0 pin, can be connected to single analog signal, digital signal module.
G\V\A1 interface：Equal to UNO R3 A1 pin，Can be connected to single analog signal, digital signal module.
G\V\A2\A3 interface：Equal to UNO R3 A2-3 pin，can be connected to an ultrasonic module.
G\V\A4\A5 interface：Equal to UNO R3 A4-5 pin（IIC）, can be connected to IIC 1602LCD module.
V\G\TX\RX interface：Equal to UNO R3 serial port, which can be connected to the Bluetooth module.
ESP-01 interface：Equal to UNO R3 serial port, which can be connected to ESP-01 wifi module.
Buzzer_D11：The buzzer is controlled by the UNO R3 11 pin.
RESET：UNO R3 reset button.
KEY_D13：Connect the UNO R3 13 pin.
9V：battery voltage 9V,
12V: battery voltage 12V
Power：Power switch, ON to turn on the power, OFF to turn off the power
V、G：The positive pole of the DC5V/1A power supply, and the negative pole of the DC5V/1A power supply.