I want to power a small watering system. The watering will be provided by 2 water pumps RS-360SH. They don't need to run parallely. From measuring of the pumps I know, they draw about 1,7A at running (dry) and a bit over 3A at start. Should I use 5A PSU, or will be the 3A PSU with some larger capacitor enough?
I would like to power from the same PSU also the arduino and relay board.