PIR Motion Sensor HC-SR501
The PIR (Passive Infra-Red) Motion Sensor detects motion human "or even pets" movement in the surrounding by measuring changes in the infrared (heat) levels emitted by surrounding objects. When motion is detected the PIR sensor outputs a high signal on its OUTPUT pin.
- Single bit output
- Simple 3 wire interface (Power,Gnd,Output PIN)
- Small and lightweight
- Works on normal 5v microcontroller up to 15V (e.g. Arduino)
Tutorial / Document: