Review on π HiLetgo 3pcs HC-SR501 PIR Infrared Sensor Human Body Motion Module for Arduino Raspberry Pi by Dwayne Pore
Motion sensors in security and surveillance systems
I like these little motion sensors. I connect them to ESP8266 development boards and create my own home security system at a fraction of the cost. I also connected one of these to some LEDs with a relay so they light up as soon as I enter the room. Many possibilities. .
- few competitors
- unreliable
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