120v AC relay with 5v trigger?

Discussion in 'General Electronics Chat' started by Razor Concepts, Apr 4, 2009.

  1. Razor Concepts

    Thread Starter Active Member

    Oct 7, 2008
    212
    1
    I want some way to turn household items on and off using a 5v AVR microcontroller. Is there a 120v AC relay that has a 5v trigger? I can't seem to find any. I have seen some 24v trigger ones, so I guess I could just use two relays (5v trigger 24v connected to a 24v trigger 120v) , but it seems kind of messy.

    Also is there any other way I can turn household appliances on and off based off of a 5v microcontroller? The only other way I can think of is something mechanical that physically flips a light switch up and down, but that seems a little too jerry-rigged for me.

    Thanks!
     
  2. lake_dave

    New Member

    Jan 28, 2009
    1
    0
    Try an Opto-22 OAC5. That should do the trick.
     
  3. pilko

    Active Member

    Dec 8, 2008
    213
    20
    Seems like you need a reley with a 5 volt coil.they are very common.I buy mine from Futurlec --"futurlec.com" $2.00.
     
  4. pilko

    Active Member

    Dec 8, 2008
    213
    20
    Forgot to mention.--Make sure you use a relay with adequate contact voltage and current ratings
     
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