Capacitive dropping in LED bulbs is what I am using to get a floating 12V/20mA supply straight from mains using two 1uF caps (1 for N and 1 for A). Won't go into details, here is the LTSpice model. I needed a 12V supply referenced to the 0V DC from a high power 240AC bridge, so that I have it for circuitry (that only needs about 10mA btw) doing some serious power control using PWM buck etc. controllers tat are not designed for high voltage use (xformer isolated MOSFET of course). anyway, ...not the subject here, so I'' won't go any further,
....BUT, BUT, BUT... it is what led me to the 0.47F across mains the thing, when I was looking at commercial EMI filter designs! Most use 0.22uF, some 0.47uF, a few use 0.1uF.
ONCE AGAIN THANKS ALL FOR SHOWING ME SOMETHING I SHOULD KNOW FROM BASICS
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