Reed Switch Train Detector for the Lego RCX

Overview:

I wanted simple way to detect Lego trains passing over a section of track. I finally decided on using a reed switch instead of a light sensor, or a custom made light beam detector due to its small size, and still looks like Lego.

Equipment Needed:

  • 2x4 Plate
  • 2x4 Tile
  • 9v Power Connector
  • Reed Switch
  • 22 Guage Wire (Optional)
  • Resistors (Optional)

Set Up:

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