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On off circuit help

  1. Oct 30, 2014 #1
    Hi I want to make a circuit with AC and 2 light bulbs and a switch. One light bulb will light when the switch is open, but will be off when the switch is closed. The other bulb will have the opposite effect.
    I tried to use transistors but that only works for DC current.
     

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  3. Oct 30, 2014 #2

    phinds

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    You want a simple DPDT (Double Pole Double Throw) switch. What you are describing is a common use of a DPDT switch and you can buy them at any hardware store.
     
  4. Oct 30, 2014 #3
    Thanks, thought a bit too difficult.
     
  5. Oct 30, 2014 #4

    phinds

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    Sorry, I don't know what you mean. Do you mean that you though it would be difficult and are happy to find out that it is easy or do you mean that you think a DPDT switch is too difficult? There aren't very many things more simple than a DPDT switch and for what you want to do there is NOTHING that is more simple.
     
  6. Oct 30, 2014 #5
    What I mean is that I thought it would require a lot of parts, but turns out it's that simple.
     
  7. Oct 30, 2014 #6

    phinds

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    Yes, good. It IS simple.
     
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