Yep a 15A unit. Thanks that was what I thought but it was gut not knowledge :) -----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Brad Gass Sent: Thursday, August 02, 2012 8:44 PM To: Technical Tools Mail List Subject: Re: [Techtoolslist] Dummy load on power supply In the non-arcade SMPS part of my world, as a general rule 5% of rated output is usually more than sufficient to stabilize cross-regulation - sometimes it's a lot less actually. However, I can't speak directly to the cross-regulation performance of the Peter Chou supplies as I've never loaded them in that manner. But if it's one of the 15A units, I think 1A should be more than enough. ----- Original Message ----- From: "David Shoemaker" <davids@oz.net> To: "Techtoolslist@Flippers. Com" <techtoolslist@flippers.com> Sent: Thursday, August 2, 2012 9:56:02 PM Subject: [Techtoolslist] Dummy load on power supply I am testing a board that takes 12v in. I am using a Peter Chau supply on my bench. As the voltages follow 5v on those I need to load the supply somewhat to stabilize Is 1A enough? Thanks, David _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

Get two 5 ohm 10 watt resistors and put them in series. Put the 6.3 volt bulb across one of the 5 ohm resistors. Connect the series pair to the 12 volts. It will draw about 1,3 amps and the bulb will light.. regards, T ----- Original Message ----- From: "David Shoemaker" <davids@oz.net> To: "'Technical Tools Mail List'" <techtoolslist@flippers.com> Sent: Wednesday, August 08, 2012 1:12 AM Subject: Re: [Techtoolslist] Dummy load on power supply Ok I thought I would be smart and put a light in series with the resistor, draw a little more and let me know everything is on. I put a #1847 6.3v 150ma bulb in there along with a 10ohm 10watt resistor (figured I would get 650ma draw). Light turned on but 12v was only around 10v. Regulation wasn't stabilized. I dropped back to a 1ohm 25w resistor. Lamp was a little brighter but still the same 10v. Pulled the lamp out and left the 1ohm resistor in there. 12v was nice and steady at just over 12v. This leads me to believe that the wattage rating is the max current the bulb will pass (and consume). I never really thought of it before (haven't built anything using an indicator bulb before :) Am I right or just confused? Thanks, David -----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of David Shoemaker Sent: Thursday, August 02, 2012 9:32 PM To: 'Technical Tools Mail List' Subject: Re: [Techtoolslist] Dummy load on power supply Yep a 15A unit. Thanks that was what I thought but it was gut not knowledge :) -----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Brad Gass Sent: Thursday, August 02, 2012 8:44 PM To: Technical Tools Mail List Subject: Re: [Techtoolslist] Dummy load on power supply In the non-arcade SMPS part of my world, as a general rule 5% of rated output is usually more than sufficient to stabilize cross-regulation - sometimes it's a lot less actually. However, I can't speak directly to the cross-regulation performance of the Peter Chou supplies as I've never loaded them in that manner. But if it's one of the 15A units, I think 1A should be more than enough. ----- Original Message ----- From: "David Shoemaker" <davids@oz.net> To: "Techtoolslist@Flippers. Com" <techtoolslist@flippers.com> Sent: Thursday, August 2, 2012 9:56:02 PM Subject: [Techtoolslist] Dummy load on power supply I am testing a board that takes 12v in. I am using a Peter Chau supply on my bench. As the voltages follow 5v on those I need to load the supply somewhat to stabilize Is 1A enough? Thanks, David _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/