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  1. hightechstuff2

    Modulated Interlock Loop Safety Curcuit....

    Hi Everyone! I am looking for a schematic for this circuit but I cannot seem to find anything. What I am looking for is a simple circuit that it most likely 555 timer based. What I want it to do is send a 5V square wave signal, maybe 10-100Hz, through a 12' to 200' max through one lead on a...

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