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[quote user="rrinker"]   Guess I misread, I was under the impression that these were choices the OP already had and wanted to know which one was best, not a list of options to buy. With luck something close would be just laying around although a lot of smaller devices that leave working wall warts behind when they expire use less current, but worth checking before spending money.                  --Randy <div style="clear:both;"></div> [/quote] Well I do have several 12VAC around of various amperages, and can pick up something with more voltage in the junk store in town for a couple bucks. But since I found out those Class II power supplies actually put out  variable amounts of voltage I have only gone with switching power supplies for my use lately.....they cost only $5 more or so than the unregulated supplies and I can be sure what I am getting. With my meter I have found 9V units that make anything from 12 to 17V available and using a Class II 12 V might just allow more than 20V through....no?....although I have one in my hand now that reads 14.2 V and is 1 amp.....maybe that is good enough and I am being too cautious.
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