Reply to "PW Whistle Detection Circuit"

gunrunnerjohn posted:
Time for a compact design that we could commit to OSH Park PCB fabrication.

I did that for my TrackBat - It is a C or D Cell drop in replacement that uses track AC power to provide low voltage DC for the postwar horn. I thought about putting circuitry similar to the above to also act as the DC Relay, but ran out of space to fit within the confines of the battery adapters I was using.

10/17/168:17 PM

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