ATX PSU breakout/adapters - Re: Cambridge Workstation woes - VMS 2691 PSU smoke

Toby Thain toby at telegraphics.com.au
Sun Jul 30 13:25:56 CDT 2017


On 2017-07-30 12:18 PM, Jules Richardson via cctalk wrote:
> On 07/30/2017 10:59 AM, Ian Frost via cctalk wrote:
>> Any body any experience in fixing these old Acorn PSUs - or managed to
>> source alternative modern supplies?
>
> There wasn't anything "special" about them, in that the outputs were
> typical for "small computer with a hard disk" (i.e. +5V and +12V at a
> few amps, -5V and possibly -12V, main regulation done on the +5V rail,
> "hard start" via physical switch).
>
> I expect it's possible to find a modern PC PSU in some kind of slimline
> form-factor which will physically fit (and rig the soft-start so that it
> powers up as soon as AC is applied).

FWIW I recently discovered this little PCB which looks darn useful for 
power control + breakout (ignore the RPi part).

https://hackaday.io/project/20963-mini-atx-psu
https://www.tindie.com/products/tomtibbetts/piryte-mini-atx-psu-for-raspberry-pi/


 > I expect the current limits for the
> different rails are printed on the side of the VMS PSU's frame, so
> as-good-or-better should be fine.
> ...
>
> cheers
>
> Jules
>



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