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Car courtesy lights delay switch circuit

2014-12-08 03:28  
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The car courtesy lights delay switch circuit inside the doors closed to keep the light about one minute. When you open the door contacts, VE pulse is applied to the base of Tl. This transistor, T2 and 10 LLF off capacitor. T3 is turned on, holding the internal light.


The  capacitor takes one minute to discharge when the circuit reverts to its original state.


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