I have a 5V (2A max.) circuit for multiple Attiny84s and a 12V (4A max.) circuit for stepper motors. Does my negative wire have to have a 6A current rating now? Or will I be able to use less?

12vDC 4A + 5vDC 2A negative wire current rating

Paul_B September 23, 2021, 10:42pm 9

How would that work since the steppers are always powered?

(I feel Déjà vu just now!)