Opto-Interrupter with Mounting Tabs


Availability: In Stock


SKU: SEN-114 Mfg Part Number: TCST2103 Categories: , Tag:


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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  Difficulty Level

Soldering Skill: N/A
Prototyping Skill: Beginner
Programming Skill: Beginner

  Product Certifications

  Product Attributes

Weight: 2 g

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.

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