ULN2003 Stepping motor driver
ULN2003 stepping motor driver is used to convert the weak signal into powerful control signal to drive the
stepping motor. The input signal IN1-IN4 corresponds to the output signal A-D, and4 LED is integrated in
the board to indicate the state of signals. The PWR interface can be used as a power supply for stepping
motor. By default, PWR and VCC are connected by a short circuit.
Circuit
When building the circuit, the rated voltage of the stepping motor 5V, and use the breadboard power supply
independently, and do not use the RPi power supply. Additionally, breadboard power supply needs to share
Ground with RPi.