PIR Sensor Module (HC-SR501)
Passive Infrared Motion Detector
or 4 payments of $0.99 with Info
PIR sensors "Passive Infrared" or "IR" sensors detect motion by measuring changes in the infrared levels emitted by surrounding objects. This module gives a HIGH (3.3V) signal when motion is detected with a trigger delay that can be set anywhere from 0.5 - 200 seconds. PIR sensors are usually used in security devices and detect when someone entered the monitored room. These can also be used to automatically control lighting and other things too!
- Input Voltage: 4.5V - 20V
- <100uA current draw
- Digital output: 3.3V (High)
- Digital output: 0V (Low)
- Delay: 0.5 - 200 Seconds
- Sensor angle: ~110°
- Range 5m - 7m
The sensor could be powered via 3v buts requires you to bypass the regulator with a soldering hack.