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Build a passive infrared sensor circuit diagram
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![PIR Sensor Based Security System, circuit diagram,working,applications](https://i2.wp.com/www.circuitstoday.com/wp-content/uploads/2011/07/PIR-Sensor-Based-Security-System.jpg)
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![How PIRs Work | PIR Motion Sensor | Adafruit Learning System](https://i2.wp.com/cdn-learn.adafruit.com/assets/assets/000/035/647/medium800/proximity_pir-diagram.png?1473477850)
![Simple PIR sensor circuit - theoryCIRCUIT](https://i2.wp.com/www.theorycircuit.com/wp-content/uploads/2015/12/Simple-PIR-sensor-circuit.jpg)
![infrared - PIR sensor (with open collector) + Arduino - anomalous](https://i2.wp.com/i.stack.imgur.com/9WIER.jpg)
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![5 Simple Motion Detector Circuits using PIR - Homemade Circuit Projects](https://i2.wp.com/www.homemade-circuits.com/wp-content/uploads/2013/08/LDRcontrolledmechnaismcircuit.png)
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![PIR Sensor Based Motion Detector / Sensor Circuit Diagram](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram/PIR-Motion-Detector-Circuit.gif)