PIR MOTION SENSOR

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hello sir/mam,
                             i vinod demeler technology. working on project using pir motion sensor arduino has bug when fix time delay output works 2 or 3 hours after works manual switch means gives output continue bulb or led , if change delay timing again works again 2 or 3 hours , same condition rises pls guide asap.



regards
vinod     

try replacing sensor , check if problem persists. (maybe got faulty unit).

pls provide model of pir sensor. hc-sr501?


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