Quote:
Originally Posted by AndrewJ
Just two comments
Re low side switching and shorting, if you use "unswitched" RCA connectors on the controller, you can always wire the 12V to the centre, and this makes it much more difficult to accidentally short out
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Andrew
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Andrew...I have checked this and any PWM low side switch...will see a voltage on the outside of the RCA shell when you lower the
PWM output.
It doesn't matter if you wire the Vcc to the inner core...the outer shield will become Vcc with the heater output device off or at very low mark space ratios.