Description
An opto-interrupter is like a tiny trip line, when something solid passes between the emitter and the receiver it is detectable as a change in the digital output. These are great for making very low cost rotary encoders and optical end stops. Use this with our Encoder Disk to create a simple rotary encoder.
To use this sensor simply connect the LED Anode to 5VDC and the Cathode to ground through a ~150 Ohm resistor. On the receiver side connect the Collector to 5VDC and the Emitter to a ~10K Ohm resistor (going to ground) as well as your Arduino or other microcontroller digital input. The pin spacing is ideal for perfboards and protoboards, making this easy to mount on circuit boards.
Please Note: Encoder Disk sold separately.