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https://github.com/j3rn/pir-alarm

A simple Arduino program for using a passive infrared sensor to trigger an alarm
https://github.com/j3rn/pir-alarm

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A simple Arduino program for using a passive infrared sensor to trigger an alarm

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PIR-Alarm
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This is a simple project that uses a PIR sensor, 2 LEDs, and a piezo element to make a human-sensing alarm.