u/guysplzno

I am working on a Arduino based project that drives a A4988 motor driver and Nema 14 stepper motor to randomly rotate the face plate of this fake fire alarm box I made.

I got it all working when plugged into the wall using a 12v 1A power supply but now that I have added a BMS, 3S 1A charging module and 3x 18650s it won't work.

I'm getting 12v from the battery pack and B+/B- on the BMS but no output on the P+/P- of the module.

I'm quite new to electronics so might have done something obviously wrong.

Any help appreciated!

I am working on a Arduino based project that drives a A4988 motor driver and Nema 14 stepper motor to randomly rotate the face plate of this fake fire alarm box I made.

I got it all working when plugged into the wall using a 12v 1A power supply but now that I have added a BMS, 3S 1A charging module and 3x 18650s it won't work.

I'm getting 12v from the battery pack and B+/B- on the BMS but no output on the P+/P- of the module.

I'm quite new to electronics so might have done something obviously wrong.

Any help appreciated!