Motor driver based on AT8870

# Two-way motor driver based on AT8870

## Introduction

  This project is a two-way motor driver module based on AT8870 chip. The key parameters are written on the PCB according to the chip manual, such as input voltage, drive frequency, and output current. At that time, the idea was to simply drive a motor. Now that I have finished it, I think it can actually be optimized in the direction of how to better adapt to coded motors (six pins).

## Description

* External power supply port (three types)

DC-005-20A 2.2P_PH2.54 3.2P_2.54 pin header

But I think that the commonly used power supply port is still DC-005, and then the 2P_PH socket can power other modules, and can also connect the next same module to complete the splicing of the four-wheel drive. Of course, be careful not to connect it in reverse. (After welding, I thought of it).

* In the input control part, different colors of pin headers are used to distinguish the three types of power supply positive, common ground, and input port to avoid silk screen printing on the back and misreading when wiring on the front.

* When the module is powered on, the LED light will light up. The current limiting resistor of the LED is 2K in the schematic diagram. I used 1K when soldering it. It feels a bit too bright. I suggest to use a larger one.

## Image

  test device: STMF103C6T6 minimum system board + 12V battery + the module
! [test 1.jpg] ! [test 3.jpg] ! [test 2.jpg] ##
  I don't know how to compress the size of the demonstration video at the end, so I can only finish it quickly.