I'm building a device, which can water my plant after certain input. The whole problem I've got is connecting a water pump to RSPI - I more or less understand that I need a relay, but is it possible to power up the whole kit from a batteries ? Or using just one wire?
I'm thinking about using aquarium pump, just like guy in this tutorial, but all aquarium pumps don't have specifications, so
I read this tutorial, and It was very helpful, but still don't know how to pick right relay & pump, and the whole problem of powering this setup without plug - is this even possible?
I'll be very helpful for some guidelines & tips.
Have a nice day