Thread: 12V Charger
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Old 6th Dec 2014, 9:53 am   #9
Alistair D
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Join Date: Jan 2010
Location: Edinburgh, UK.
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Default Re: 12V Charger

Your meter is measuring the mean value of the rectified waveform. Connect an electrolytic capacitor across the output and measure again to get the peak value. Assuming that there are no high resistances in the path anything above 13V should provide some charge.

100R is too high as a load. A car indicator bulb or some other 12V device that consumes an amp or two would be better.

Al
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