Documenting the optical switch thing found in the retro arcade parts.

2026-09-02 10:30:05 -07:00
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 created: 2026-09-02T10:20:00
 Index: Glitch
 tags:
  - project
 source:
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 # Optical Interrupt Switch for {game}
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 Datasheet for Slotted Optical Switch
 https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Datasheet/OPB610-611-620-621.pdf
 4 wires going out of the board they are on:
 - Red - power, at least 2v to see anything happen, not sure of optimal range.
 - Black - GND
 - White - data out for 1 of the sensors
 	- Although there is a difference in voltage state of this wire when the sensor is triggered, it is a very low difference.
 	- When powered by 3.3V, it goes from 80mV to 240mV
 - Green - data out for the other sensor
 	- This wire has a much bigger voltage difference when the sensor is triggered. 
 	- When powered by 3.3V, it goes from 1.92 to 3.32
 ![[OpticalSwitchVoltageDifferences.jpeg]]
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