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One shot LED circuit

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One shot LED circuit

Postby slurch » Sun Apr 21, 2013 5:40 pm

Hi all,
I've been looking for a while now and testing different answers on multisim but none seem to work with what I need.
Basically I need a circuit that has a 12v input and when a switch is on it powers and LED for 3 seconds and then turns off even if the switch stays on, and draws no power once the 3 seconds are up.

Cheers for your help
slurch
 
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