Just a note on the Russ's schematic. Standard practice is to put two resistors (one across each cap or set of caps) across any electrolytic caps that are stacked in series. This is to provide a voltage divider that swamps out leakage current in the caps and keeps the voltage balanced across them. Since this is a cap bank the resistor current should be greater than the leakage for each set (upper or lower). If each cap was rated for 100 uA max leakage and there are five + five in series at 175VDC across each half then 175V/500uA = 350K, 1/4W but don't use one 1/4W resistor. To keep a good voltage rating, split the value into 2 or 3 resistors. So 3 x 100K (1/4w) or 2 x 150K (1/4w) across each half of the bank would be good.
Babble
RE: Let's build A "Popper" Noble Gas Engine AKA Ppap Engine.
« Reply #1050, on November 29th, 2012, 03:24 PM »