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EEVblog => Other Blogs => Topic started by: made2hack on July 24, 2017, 10:47:02 am

Title: ATX PSU to bench-top power supply conversion (yet another)
Post by: made2hack on July 24, 2017, 10:47:02 am

Hello all,
My ATX PSU to bench-top power supply conversion.
Enjoy!

https://www.youtube.com/watch?v=LGeyL1KRKWQ (https://www.youtube.com/watch?v=LGeyL1KRKWQ)

Title: Re: ATX PSU to bench-top power supply conversion (yet another)
Post by: joseph nicholas on July 24, 2017, 01:33:49 pm

I have at least 10 of these ATX/AT power supplies laying around and not one of them needs a dummy resistor to power up. 

Title: Re: ATX PSU to bench-top power supply conversion (yet another)
Post by: made2hack on July 25, 2017, 08:53:57 am

Do they have fans installed? Maybe the fans act as loads?

Title: Re: ATX PSU to bench-top power supply conversion (yet another)
Post by: joseph nicholas on July 25, 2017, 09:56:17 am

Yes they all have fans.  All atx/at computer power supplies have fans.  And when I disconnect the fans they all come on and supply power without any load whatsoerver.

Title: Re: ATX PSU to bench-top power supply conversion (yet another)
Post by: Specmaster on July 25, 2017, 10:10:24 am

Yes, its correct, I have them with and without a fan and they will switch on OK.

Title: Re: ATX PSU to bench-top power supply conversion (yet another)
Post by: made2hack on July 25, 2017, 05:04:37 pm

To be honest, the original PSU I hacked (the black one I disassembly) I built around 2 years ago. I cannot remember at the time why I added the load resistors and just kept them for the updated one.