The Arduino code uses the AFMotor library to control 4 DC motors connected to an L293D motor shield. The serial interface listens for commands: F: Move Forward B: Move Backward L: Turn Left R: Turn ...

Arduino Uno: Microcontroller for program execution. Adafruit Motor Shield: Interface for motor control. L293D Motor Driver: Dual H-bridge driver for bidirectional motor control. DC Motors (4): ...

Watch this video on YouTube. “Motor voltage: 24 VDC, 38 VDC (E-type). In my case, I used 12VDC power supply to the motor because this voltage level is compatible with L293D Motor Arduino Shield.

This shield could be a good alternative to hobby RC controllers for robots that need a customizable open-source motor controller. The PCB design and source code are available on GitHub.