Hi, is it possible to reasonably reliably and reasonably safely, backpower the Raspberry Pi from the Explorer HAT Pro? If so, how?
I picked up an EHP from the Birthday Bash as it looked ideal for a number of projects, notably my Pololu Zumo Chassis + metal gearmotors + Raspberry Pi Model A+ . (Great to meet you guys, by the way - I’m Andrew from Cotswold Jam, the chap with the daughter who loves the Lego bases).
The Zumo has a 4xAA battery compartment giving 4x1.5v=6v . I know I can channel this through the EHP’s H-bridge motor controllers to give power to the motors, my question is whether the EHP could also be used somehow to use the same batteries to power the Raspberry Pi.
My alternative option is to use a stepdown transformer to take the 6v and turn it into 5v, and then split this across both the Pi and the motors. My DC:DC stepdown transformer takes anything from 3-12v and converts it to USB power (5v) but ideally I’d like to do away with it and use the EHP for everything.
Third option is to use a cheap USB emergency phone charger, which I already have, to power the Pi and leave the 4xAAs solely to power the batteries. But that’s inelegant, and adds bulk.