ULN2003

From ElectroDragon
Jump to navigation Jump to search

Wiring with Arduino

Here are schematics showing how to interface a unipolar stepper motor to four controller pins using a ULN2003A, and showing how to interface using four TIP120's.

Stepper schematic.jpg
  • IN1-4 to the MCU IOs
  • The pins in the white jack (from left to the right) are: Motor VCC, A, B, C, D (to the stepper motor)
  • Power switch pins: GND, VCC, VCC, Motor VCC, use jumper to choose using shared VCC or not.


ULN2003