Clive George wrote:
wrote in message
ups.com...

I'd use 3 capacitors in parallel. 22uF (which is probably adequate),
then a 1uF and a 100nF all in parallel, because I'd be worried about
filtering high frequency electrical noise from the starter.

Does that actually work? My rather simple understanding of capacitors
was that if you stick them in parallel, they just behave like one larger
one. Or is the resistance of the wiring somewhere providing a useful
effect?


More that the coiled up-ness of the big capacitor puts substantial
inductance in series with it. Also electrolytic capacitors have a
measurable internal resistance.


cheers,
clive