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fiddler
New Member
United Kingdom
4 Posts |
 Posted - Apr 19 2006 : 12:59:49 PM
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Hi, I want to build my own 24-12 volt converter, to use on my recovery truck. The truck runs on 24 volts, and so, delivers 24 v to the trailer plug....all the trailers/caravans I tow, run on 12 volts, so I have to drag a trailerboard out in all weathers, find a way to secure it to the rear of the trailer/caravan...run the lead along the side of the caravan, etc, etc....which is time consuming, and a real pain in bad weather. So, if I can make a converter to plug in to my trailer socket, I can use the trailers own lighting plug......=joy :-)
So if anyone can provide me with plans and a component list, I would be so grateful...thanks.......Dave
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Apr 19 2006 : 1:54:27 PM
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Depends...How much current at 12V do you need? Only a few amps is easily taken care of by linear regulators. About 10A can be handled by a linear regulator and a few pass transistors. Any more and you have to start looking at DC-DC converters (which are basically switching power supplies).
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fiddler
New Member
United Kingdom
4 Posts |
Posted - Apr 19 2006 : 2:38:00 PM
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Just enough to power a trailer........indicators, stop/tail lights......2 of each.........doesn't sound much to me....what do you think?......it's been so long ago since I did any calculations in this field........I=VxR......it's all coming back..........haha
btw, thanks for replying so quickly......
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Apr 20 2006 : 09:20:51 AM
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It depends. Many of those indicators can draw several amps. You don't need very tight regulation for lights, so just a regulator and a pass transistor will do the job. Check the datasheet for the LM7812 regulator for a schematic.
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fiddler
New Member
United Kingdom
4 Posts |
Posted - Apr 20 2006 : 5:57:31 PM
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Ok, you're losing me already.......where and how do I do that?.......I need my hand holding all the way here..........
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Aaron Cake
Administrator
Canada
6718 Posts |
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fiddler
New Member
United Kingdom
4 Posts |
Posted - Apr 21 2006 : 4:04:28 PM
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Thanks......will do that...............dont go away.....lol................:-)
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24-12 volt converter
