Buglar Alarm Using PIR MOTION SENSOR
In this INSTRUCTABLE, We are going to make a simple BUGLAR ALARM using PIR MOTION SENSOR & ARDUINO HOW DOES IT WORK?The PIR sensor itself has two slots in it, each slot is made of a special material that is sensitive to IR. The lens used here is not really doing much and so we see that the two s...By: miymakers
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[original story: Instructables]