poliss
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Model Railroad & Misc. ElectronicsHeadings incude:
Light Activated Detector Circuits
Current Activated Block Occupancy Detector Circuits
Switch (turnout) Machine Control Circuits
Automatic Reversing Circuits
Automatic Operations Circuits
Signals Circuits
And many others.
Very useful for those who know their thyristors from their diodes.
http://home.cogeco.ca/~rpaisley4/
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