Hi Martyn, Thank you for answering my previous questions, I forgot to ask you what power supply would you recommend. I have various 12v power supplies but differing Wattage and Amperage. I do not want to conect one that would fry my controller or one that was not strong enough to run it.
Work out what power you need then add more for safety.
The Arduino generally uses around 25mA, a HC-05 can draw 40mA.
The valves can draw anything from about 30mA up. The Chinese valves I like use about 250mA and I normally use 4 at a time.
This means if I have all valves on at the same time they need 1A. The rest of the circuit needs around 75-100mA. Adding a bit of margin I went for a 12V 2A power supply which has worked well for several years now. I also have a 24V 5A power supply but I do not use this that much.