12V Trigger Circuit For Auto Cooling Fan On

Discussion in 'The Projects Forum' started by carburized, Nov 23, 2009.

  1. carburized

    Thread Starter New Member

    Nov 22, 2009
    I have an amplifier that gives a continuous trigger output of 12V and 12mA when switched on. I am looking to switch on by a relay, four computer case type cooling fans each rated at 12V 1.68W max (0.14mA).

    To provide switched power to the fans I was planning on using a wallwart that gives a rated output of 12V and 1A.

    I'd appreciate advice on what type of relay to look for and any diode needs etc. A simple circuit diagram would be great, thanks for looking.
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    Any TO-220 25-100V, nFET will work