I am building a automated cat feeder with a Arduino. I’m done with the programming and most of the electronics is figured out. For the water I have a relay close at a certain time to give power to a 12v solenoid that pulls about 1 amp.
For power I have 4 18650s in series and I’m going to wire that to a buck converter for a constant 12v
My question is having the batteries in series to the buck converter to the solenoid, will there be any problems with that set up?