Sensor Closeup

This is a closeup shot of the sensor. The E side corresponds to the emitter and is basically an infrared LED. The S side corresponds to the sensor and is a phototransistor. Optimal distance is about 0.150" from the sensor to the refletive surface.

I bought mine from The Mark III Store but you can also get them from Digi-Key or Mouser. Bigger...

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Copyright 2006 by Dave Hylands