Opto-Interrupter with Mounting Tabs


Opto-Interrupter with Mounting Tabs


SKU: SEN-114 - Mfg Part Number: TCST2103


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.

Please Note: Encoder Disk sold separately.


  • Ideal for non-contact end stops and wheel encoders
  • Easy to connect
  • Gate Width: 3mm
  • Mounting Hole Size: 3.3mm
  • Dimensions (overall): 24.5 x 6.1 x 21.25mm
  • Dimensions (excluding leads): 24.5 x 6.1 x 10.4mm
  • Mounting Hole Spacing: 19mm


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In stock (can be backordered)

SKU: SEN-114. Categories: , . Tag: .
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