PIR motion sensors, enable you to sense motion. Everything emits a small amount of infrared radiation and the hotter something is, the more radiation it emits.
PIR sensors can detect a change in average IR levels of their detection zone (e.g. when a human enters a room, that room will increase in temperature slightly) and hence sense motion.
This PIR sensor can be powered by Raspberry Pi's 5V output and be read directly from the Raspberry Pi's GPIO input (the sensor has a digital 3.3V output!)
Adjustable delay before firing (approx 0.5 - 200 seconds)
Adjustable sensitivity and two M2 mounting holes!
Input Voltage: 4.5V-20V power (or 3V by bypassing the regulator with a bit of soldering)
Digital signal output (3.3V) high, 0V low.
Sensing range: 5 to 7 meters in a 100 degree cone.
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