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12V Power supply
beerbarrel wrote:
Anyone have a source for a schematic for a 12v around 20 to 30 amp power supply that makes use of a full wave rectifier? I've found quite a few for a bridge rectifier but I'm not really sure how to mod them to use a full wave rectifier. I have a nice 32v 30 amp center tapped at 16v transformer that I would like to make use of. Thanks... You can use half of your bridge with this transformer to produce something like 22 volts DC at the filter cap. Connect each end ot the secondary to one of the AC inputs ot the bridge and connect the cap and load between one of the DC connections of the bridge and the center tap. If you use the + terminal of the bridge, it will be the positive output. If you use the - terminal of the bridge, the center tap will be the positive output. The bridges will handle a bit more current than they are rated for, because only two of the 4 rectifiers will be getting hot. They will certainly need a heat sink for anything like 20 amperes out, though. After you get that working and running a couple 12 volt headlights in series (at least), you can start thinking about how to regulate this down to 12 volts. -- John Popelish |
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