Review on HiLetgo 3pcs AM312 Mini Pyroelectric PIR Human Sensor Module Infrared IR Sensor Body Manual Motion Infrared IR Detector by John Bailey
Simplicity and reliability
They are tiny and require no adjustments. They all worked great for me. Range probably 10-15 feet. They really need a "warm-up" period before they start providing stable readings. Once turned on, they work within 2 seconds, but usually take about a minute for readings to be consistent. I use them with a 3 volt logic microcontroller. Definitely recommend.
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