Description: This sensor is composed of an infrared emitter on one upright and a shielded infrared detector on the other. By emitting a beam of infrared light from one upright to the other, the sensor can detect when an object passes between the uprights, breaking the beam. Used for many applications including optical limit switches, pellet dispensing, general object detection, etc. Gap width = 10mm
A breakout board is available.
Based on 2 ratings:
They are very easy to use and work very will.
Works absolutely fine. I am using it on a “persistence of vision” wheel to time the start of the display. The interruption lasts a fraction of a millisecond but triggers every time. I highly recommend buying the related circuit board. It makes mounting and use easier. I would also recommend that Sparkfun add mounting holes to the board. Current version has no screw holes.