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 9V batteries

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PinballWizard



Posts : 7
Join date : 2013-06-22

PostSubject: 9V batteries   Sat Jun 22, 2013 2:54 pm

We are just using a string of Qty5 x 9V batteries, and a series resistor to limit current to <250mA.
Charging 18000uF to 45V in just a little over 1min. 5 x [RC time constant] is a complete charge.

-edit- That was 26x 18,000uF. And 1min isn't long enough for
a full charge. More like 7 min... R=180
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