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Old 16th Jul 2018, 3:45 pm   #10
Ambientnoise
Heptode
 
Join Date: Feb 2006
Location: Marlborough, Wiltshire, UK.
Posts: 917
Default Re: Dropping voltage

Just noticed that you have several 7812s but no suitable power resistors. How about two 7812s in series ? The first configured with a couple of resistors a la LM317 to give say 23v, then the 12v one. Splits the dissipation and the degraded regulation of the first one is of no consequence. Saves buying wirewounds .

Ken
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