I've had good luck with the Power Trends (now Texas Instruments) PT51xx series, but unfortunately they are at end-of-life. The PT5102 is a 12-volt 1-amp three-terminal switching regulator.
http://www.ti.com/product/pt5102 The PT5101 was the 5-volt version. I think there is (or used to be) a 3-amp series as well, but I don't recall the part number. Maybe with a little digging on the TI website you can find a suitable replacement that will meet your needs. Last time I browsed through the Digi-Key catalog (back when they still printed one) there were many such power modules available. .73, Brent, KD0GLS, Minneapolis On 27 Jun 2013, at 13:51, Bob Stewart wrote: > The transformer gives me about 20 volts DC out. Dropping 8 volts at 1 amp is > just a lot of power to void with a resistor. I'd like to avoid having that > much waste heat in the unit. I do have an old power brick, but I was hoping > there was some small switching board that people had had good luck with. > Maybe the brick is the best option. > > Bob > > > > > >> ________________________________ >> From: Chris Albertson <albertson.ch...@gmail.com> >> To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency >> measurement <time-nuts@febo.com> >> Sent: Thursday, June 27, 2013 1:32 PM >> Subject: Re: [time-nuts] +12 Volts 1A (plus a bit) supply? >> >> >> >> >> >> You mean you have to many volts for a 12V regulator to drop> That's easy to >> fix, use a resister in series. Make the resister par of an RC filter and >> cleaner power in the process. >> >> >> I use a plug-in power brink from an old notebook computer. I think mine >> outputs 15V and then this gets dropped to 12V and 5V with a RC filter and >> regulators. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
