Description: Photo interrupter, photogate, photodiode, phototransistor, whatever you want to call it, 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 3 ratings:
3 of 3 found this helpful:
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.
1 of 1 found this helpful:
A photo-interrupter is so versatile, I’m keeping a couple in my kit of basics such as leds, 200ohm resistors, and buttons. Your list of uses could include detecting the initial position of stepper motors, detecting the position of DC motors, detecting doors opening, closing, or sliding open and closed, detecting a coin dropping through a slot, and on and on!
I soldered this part up to the suggested (almost required) Photo Interrupter Breakout Board - GP1A57HRJ00F, and it worked great with my Arduino Mega project.
My one wish is for better application circuit documentation. As things are, most people without EE degrees will have to buy the breakout board to use the part. I couldn’t decipher the datasheet to work out a recommended wiring for Arduino.. A quick schematic sketch would be great.
So, I love this part when bought with the corresponding Breakout Board - it worked nearly the first time, and works over and over, and works for so many things. …and thanks for making the Breakout Board; it’s a lifesaver.
They are very easy to use and work very will.