Power supply

Forums Forum Power supply

This topic contains 1 reply, has 2 voices, and was last updated by  Martyn 1 year, 5 months ago.

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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

    Martyn
    Keymaster

    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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