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  1. Beginner Q & A
    Does anyone have a printable schematic for the alternately flashing ckt. for railroad crossings Thank you, Regards, tr1
    555 timer
  2. Technical Model Train Forum
    I got a LED flasher kit from All Electronincs the other day. It uses a simple circuit with a small pc board, but there is a difference between it and the classic astable wiring. referring to the schematic below, it has R1 going from pin 8/V+ to pins 6/2 (not to pin 7). R2 and the rest is the...
    555 timer flash
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