convert 18v DC to 12v DC

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  #1  
Old 06-05-01, 04:31 AM
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Question

I have a bunch of old laptop power supplies that put out 18v DC at 1.7 amps and I'd like to convert the output to 12v DC.

What's the simplest way to do that?

Thanks!

Dana Brigham
 
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  #2  
Old 06-07-01, 12:44 PM
Gary Tait
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You could use a 3 amp 7812 variant, but if you
are thinking of using it for a general 12V supply
to run car accessories, I might look into modifying
it to output less volts (by playing with the voltage reference), but you really have to know what's up
with SMPSs to do it correctly.
 
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