Battery chargers are very easy to make. All you need is a transformer and a full wave rectifier that is the basic, you will need a couple of electrolytic capacitors and a resister or two but that's about it. The transformer simply reduces or increases the A.C. voltage and the thicker the wire the greater current load. I have used pulse width modulation to charge batteries too.
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Posted by: Douglas Kay <dougkay8@gmail.com>
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