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Updated Wemos D1 Mini and AM312 PIR Motion Sensor (markdown)

Raymond Mouthaan 2018-11-09 16:48:47 +01:00
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Wemos-D1-Mini-and-AM312-PIR-Motion-Sensor.md

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PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range.
See [PIR Motion Sensor](https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/overview) for more information.
The [AM312](https://www.aliexpress.com/item/GREATZT-Mini-IR-Pyroelectric-Infrared-PIR-Motion-Human-Sensor-Automatic-Detector-Module-AM312-Sensor-DC-2/32924338791.html?spm=2114.search0104.3.8.f706107b2XhiH4&ws_ab_test=searchweb0_0,searchweb201602_1_10065_5729911_10068_319_317_10696_5728811_453_10084_454_10083_10618_10304_10307_10820_10301_10821_537_536_5730811_10843_5733211_328_5733311_10059_10884_5733411_10887_5730011_100031_5731011_321_322_10103_5729011_5733611_5733111_5733511,searchweb201603_55,ppcSwitch_0&algo_expid=1dc18730-ea08-4989-9e63-b26fd56e2ee2-1&algo_pvid=1dc18730-ea08-4989-9e63-b26fd56e2ee2) is pretty much the same as HC-SR501 but works on 3.3v instead of 5v.
The [AM312](https://www.aliexpress.com/item/GREATZT-Mini-IR-Pyroelectric-Infrared-PIR-Motion-Human-Sensor-Automatic-Detector-Module-AM312-Sensor-DC-2/32924338791.html?spm=2114.search0104.3.8.f706107b2XhiH4&ws_ab_test=searchweb0_0,searchweb201602_1_10065_5729911_10068_319_317_10696_5728811_453_10084_454_10083_10618_10304_10307_10820_10301_10821_537_536_5730811_10843_5733211_328_5733311_10059_10884_5733411_10887_5730011_100031_5731011_321_322_10103_5729011_5733611_5733111_5733511,searchweb201603_55,ppcSwitch_0&algo_expid=1dc18730-ea08-4989-9e63-b26fd56e2ee2-1&algo_pvid=1dc18730-ea08-4989-9e63-b26fd56e2ee2) is pretty much the same as HC-SR505 but works on 3.3v instead of 5v.
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/wemos/pir-am312-motion-front.png" width=300>