Switching AC load from wireless MCU

Discussion in 'The Projects Forum' started by lesneypark, Jan 1, 2016.

  1. lesneypark

    Thread Starter Member

    Dec 31, 2015

    I have a circuit query which I hope you can help with and apologies in advance if it has been covered elsewhere.

    I am developing a circuit which will switch an AC lighting circuit (230Vac, 10A max) from a wireless MCU.

    The digital output of the MCU will provide a 2mA, 3.3Vdc supply which in my naivety I thought I could pulse a non-latching relay to switch in/out the AC circuit however I am struggling to find a relay with a 6.6mW coil.

    Has anyone used a relay (standard or solid state) to do this? If so do you have recommendations on a particular component?

    I have also looked at using MOSFET's but I am a bit out of my comfort zone so any advice or pointers in the right direction would be appreciated.

    Many thanks for your help,

  2. nerdegutta


    Dec 15, 2009
    Hi, and welcome to AAC.

    I think you need a transistor to activate the relay.

    Check this Google search.