555 Timer question

Thread Starter

stevezila

Joined Dec 19, 2008
6
Hopefully someone can help with this. I'm looking to put together a circuit using a 555 timer that can dip switch adjustable for 1,5,7 minute durations so that when I get an imput from a PIR sensor, the timer will turn on a light and as long as I get reoccuring pulses from the PIR sensor meaning that there is motion in the room, the light will continue to stay on and when they leave the room the PIR will not detect any motion and the timer will time out and the light will turn off. Really Appreaciate any replies in advance.

Thanks
 
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