This Instructable will show you how to construct A Passive Infrared Sensor (PIR sensor) to Turn On and Turn off lights. The PIR sensor gets activated when light radiating from objects are present in its field of view. This Signal gets passed onto the Microcontroller which has a logic to trigger the ...By: Audigi
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from Instructables: exploring - technology - robots http://ift.tt/1BZyVwF
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