Maximum Number of Zones

[HereComesTheRain]

Hi Dan

So what you are saying is that I need a total of (3) three power supplies.

1. Pi power supply. (check)
2. Relay Board(s) power supply.
3. Irrigation Valve power supply.

Will a 5V 8A 40W AC to DC Adapter Power Supply Converter Transformer work for the Relay Board(s)?

Any suggestions for a power supply that would allow for 3 to 5 valves open at a time?

Valve Solenoid Specs - 350 mA inrush, 190 mA holding, 60 Hz - 370 mA inrush, 210 mA holding, 50 Hz

Thanks again for your input.