Power supply

Forums General Questions and Comments Power supply

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    • #2019 Reply
      Ray Phillips

      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.

      Thanks once again for an amazing web site.

    • #2021 Reply

      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.

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