ESP32 Forum

Howdy all?

I have been trying to get a small stepper motor to work with the ULN2003 driver for a while now. I have seen a couple of YouTube videos showing these working together. However when I tried it myself, I could hear the clicking from the motor but it would not move. I have tried powering directly the motor with a 5V, 4A independent DC unit. It changed nothing. It seems like the ESP32 pins do not turn on the darlington pairs of the uln2003.
Anybody has any ideas as to what these guys have done to drive the stepper motor with this motor driver?

ULN2003 isn't the best for that purpose, especially that saturation requires input level greater than 2.7V.
You're better using MOSFET with low Vgs, such AO3401, where saturation could be achieve with only 1.3V.

What motor and schematic are you using?