Reply to "Chuff switch for fan driven smoke"

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I must admit, I was initially confused by the circuit, it's upside down! I had to go back and take a second look to analyze exactly how it worked.

I was also curious about the pencil notation that crossed out the original Zener value and substituted the 13 volts.

I'm a bit surprised they transition at that high a voltage, you'd have to be really cooking down the rails to have a track voltage of 14-15 volts I would think! Sounds to me like it mostly runs on one resistor.

3/22/128:33 AM

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