Use a battery charger and a variac. Or, just use any isolation
transformer, a variac and a full wave bridge rectifier.

Pete Stanaitis
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Grant Erwin wrote:

Perhaps a newsgroup about electronics?

Barry Criner wrote:

I posted a question several days ago about needing a design for a
simple DC power supply of about 2amps at 12v that is adjustable from
an external pot. I got several answers, but none that gave me a
design for a supply. The supply does not need elaberate regulation or
filtering. Anybody got a design?

Thanks -

Barry