I need a decent RPM (~100rpm) stepper motor for one of my RPi projects and 28BYJ-48 with ULN2003 driver boards are readily available online. All works well, however driving ULN2003 (5V-12V rated) using RPi Pin-6 (5V) doesn't provide much RPM (~8-10rpm).
To achieve higher RPM out of 28BYJ-48, I got a LM2577 step-up converter module that is now connected to RPi Pin-6 (5V) and LM2577 Out+ now drives the ULN2003 driver board. Out+ is set to 10.2V using on-board LM2577 potentiometer.
Now the problem is that as soon as I start my python stepper motor driving script, RPi restarts. I don't see anything in
dmesg either. Has anyone achieved higher RPM from 28BYJ-48 using an alternate method and/or successfully used LM2577 step-up converter module with RPi?