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:
+---
+# Optical Interrupt Switch for {game}
+---
+
+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]]
+
+---