IR Break Beam Sensor (5mm LEDs)

For use with the Sensor Master

Infrared (IR) break-beam sensors are a simple way to detect motion.

They work by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way which is sensitive to that same light. When something passes between the two, and its not transparent to IR, then the 'beam is broken' and the receiver will let you know.

Compared to PIR sensors, break beams are faster and allow better control of where you want to detect the motion. Compared to Sonar modules, they're less expensive. However, you do need both emitter and receiver on opposite sides of the area you want to monitor.

This is the 5mm IR version.  It works up to 50cm / 20". You can power it from 3.3V or 5V, but 5V will get you better range and is what we suggest.

Both the emitter and the receiver are wired into a breakout for use with the Sensor Master. In the case of the emitter, it is only required to be plugged into the 5V & GND screw terminals.