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Old 03-27-2015, 06:52 PM
prembold prembold is offline
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Join Date: Jan 2013
Posts: 14
Originally Posted by citfta View Post
Is this what you are describing? I don't see any connection from the source battery to the charge battery.
simple charger 001.jpg

@citfta - very close, but he called for a TIP31C High power NPN transistors.
in your drawing you have shown a PNP transistor, also you have your batteries polarities reversed, reference : Battery (electricity) - Wikipedia, the free encyclopedia

I ran the circuit in a simulator and did not see the spikes that patdet speaks of.

perhaps this is a case of - build it and the spikes will come . . .

we should just wait for an exact schematic to be posted by patdet

Last edited by prembold; 03-27-2015 at 07:08 PM. Reason: test
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