This project is based on atmega328pb-au USB-arduino super stick

Tips:

The thickness of usb is about 2.4mm,

but it is too thick to add money,

so it is recommended to use 2mm and then add solder to increase the thickness

There is a USB on the board.

Yes, the PCB is used as the USB.

It comes with a serial port chip.

Although it is small in size, it has all the necessary functions.

There are 3 rows of pins on the board, each with 5 holes ,

Contains:

1 x TX RX serial port (can also be used as ordinary IO, but it must be unplugged before uploading the program, otherwise the upload will fail)

1 x IIC communication

3 x ADC (IIC interface is also ADC, A4, A5)

4 x PWM

Basic steering gears can be driven by I2C equipment. When there is no I2C equipment, the I2C interface can be used as an ADC.