PSU Load for testing

Repairs & upgrades.
Post Reply
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10472
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

PSU Load for testing

Post by rubber_jonnie »

Just a little something I knocked up for running PSU's with a load that isn't an ST.

It's made using the load resistors from exxos' store, an old low profile PC heatsink, a 6 pin plug and a bit of veroboard.

First step was to solder up the 5 pin plug onto the veroboard, then the resistors soldered to a common ground on one end that fed back up the veroboard to the plug, ground and the other ends to the 5v and 12v sides of the 6 pin plug respectively.

Then a spot of thermal paste on top of the heatsink and resistors, and sandwich it all up good and tight. Gets quite warm, but good for testing and adjusting without worrying about damaging your ST.

IMG_20200301_170709.jpg
IMG_20200301_170709.jpg (83.22 KiB) Viewed 1949 times
IMG_20200301_170701.jpg
IMG_20200301_170701.jpg (86.74 KiB) Viewed 1949 times
IMG_20200301_170643.jpg
IMG_20200301_170643.jpg (87.9 KiB) Viewed 1949 times
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
exxos
Site Admin
Site Admin
Posts: 23499
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: PSU Load for testing

Post by exxos »

Cool. Its like a baby version of mine :lol:


https://www.exxosforum.co.uk/forum/viewt ... 6805#p6805
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10472
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: PSU Load for testing

Post by rubber_jonnie »

exxos wrote: Sun Mar 01, 2020 8:24 pm Cool. Its like a baby version of mine :lol:


https://www.exxosforum.co.uk/forum/viewt ... 6805#p6805
I learned from the best 😁
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Post Reply

Return to “PSU (power supplies)”