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BGE's take on the Quadra 900/950 ATX PSU Mod

BadGoldEagle

Well-known member
Success! The switch fits the opening!

IMG_6770-2-2.pngIMG_6772-2.png

It almost looks like it's meant to be there from the factory.

There's only one small inconvenience: the tabs on the switch are slightly narrower compared to the ones Apple/Delta used. In order to keep things as simple as possible (and to prevent permanent modifications), wires will be soldered directly to the terminals. Spade connectors (4) will then be used to connect the switch to the AC board.
 

joshc

Well-known member
I somehow missed the last update. This is exactly what I want to do with mine (add a switch) - for now I left that hole empty after doing my conversion. Keen to hear how yours is going.
 

WillJac

Well-known member
I don't see any further posts on this great project from @BadGoldEagle. Is he still on the forum and what about the project? The GitHub has no updates for 2 years. June 26, 2022 was the last time he was on the forum.....I would like to build this but?????
 

Joe_Goes

New member
Guys where can I buy these QuadrATX boards fully populated if possible? Desperately need to put my Quadra back in working order. My original psu made a loud pop sound and tripped by circuit breaker 😭
 

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WillJac

Well-known member
Guys where can I buy these QuadrATX boards fully populated if possible? Desperately need to put my Quadra back in working order. My original psu made a loud pop sound and tripped by circuit breaker 😭
I have some boards but need to see if I have enough of the parts to make a second one. I made one for myself. But I do have to tell you, the parts not easy to find and are expensive compared normal parts. I am still waiting for 2 items for me to test mine. The parts I waiting for see not for the boards.

I don’t know what happen to the creator of the project but I hope to restart it if can.
 

Joe_Goes

New member
I have some boards but need to see if I have enough of the parts to make a second one. I made one for myself. But I do have to tell you, the parts not easy to find and are expensive compared normal parts. I am still waiting for 2 items for me to test mine. The parts I waiting for see not for the boards.

I don’t know what happen to the creator of the project but I hope to restart it if can.
I myself am interested to buy two sets of boards just incase. This project is certainly worth it to be restarted not only because I need a psu for my machine but think of all those Quadra out there with a ticking bomb of a psu which can go off without any warning and take the machine with it in most cases. Please keep me updated on the assembly of these boards Will 👍🏽 and thanks for the reply.
 

WillJac

Well-known member
I myself am interested to buy two sets of boards just incase. This project is certainly worth it to be restarted not only because I need a psu for my machine but think of all those Quadra out there with a ticking bomb of a psu which can go off without any warning and take the machine with it in most cases. Please keep me updated on the assembly of these boards Will 👍🏽 and thanks for the reply.
This what I have already done. I am waiting on 1 final part to arrive to test and get back on it. I have loads other items going on so can be a few weeks before I get to it.
 

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Joe_Goes

New member
This what I have already done. I am waiting on 1 final part to arrive to test and get back on it. I have loads other items going on so can be a few weeks before I get to it.
Wow dude that looks really nice, do you mind if I can trouble you to build one for me? Let me know how much it’ll cost?
 

WillJac

Well-known member
Wow dude that looks really nice, do you mind if I can trouble you to build one for me? Let me know how much it’ll cost?
Let me test mine and be sure it works before I make it available for others. The parts are hard to source due to shortages and some I had to pay much higher reprice for. You seeing over $100 there just on parts. Just so you know!!
 

Joe_Goes

New member
Let me test mine and be sure it works before I make it available for others. The parts are hard to source due to shortages and some I had to pay much higher reprice for. You seeing over $100 there just on parts. Just so you know!!
No worries Will, just let me know when you are ready to build as currently there aren’t any option for people like me with a blown original PSU. Pencil me down for two sets for sure. 👍🏽
 

BadGoldEagle

Well-known member
Notifications are on but I wasn't made aware of any activity.

Happy to see someone else working on this project!

One thing to keep in mind @WillJac
PLEASE double check the pinout on the Quadra side before you plug it in! The cables were meant to be soldered without a header and I am pretty sure this version of the board isn't compatible with ATX extension cables, something I changed in 2.0...

It might be fine as you have a female plug (what kind of extension cable did you find? Male <=> Male is quite tricky to find...). 2.0 has a male receptacle, for one of those:

1678555321233.png



******************************************************************************************************



Some Pics of the current boards (I still have to figure out the molex plugs that make reassembly tricky and the load resistors (which are a bit too hot for my liking). In other news, the AC Board was simplified a lot.

DC 2.0 Dev
Bildschirmfoto 2023-03-11 um 18.14.31.png

AC 2.0 (not to scale obviously, almost done, J7 might get removed)
Bildschirmfoto 2023-03-11 um 13.00.53.png

Currently thinking about using one of those secured to the original PSU's case. They're made for up to 12W in air and 25 W with a heatsink. The mounting solution is my main issue ATM as I don't want to drill any more holes in the case.
1678555199230.png
 

BadGoldEagle

Well-known member
DC Board Update

Wirewound resistor (Digikey Link, I just bought one from Farnell, also available on Mouser but not on Arrow at the moment)
+ Can be placed anywhere (not only on the PCB itself). Ideally close to the fan where it does not interfere with the PSU's heatsinks.
+ Should be way over dimensioned. Which means it should not overheat! Dissipated power for 12V => 7,2W, capable of up to 25W with a proper heatsink or 12W in the air...
+ Can be secured (needs to be verified!) with a thermal adhesive instead of screws and compound. I've found this on Amazon in Germany.

I have ordered the parts and will test them with a power brick. Should not heat up that much if I'm not mistaken.
Also added a couple of holes for "cable management" -- a zip tie should be able to keep that mess of molex cables "tidier"

Bildschirmfoto 2023-03-12 um 14.55.12.png

Being sick I can't move much from the laptop... but I've found a few pics that confirm that J7 and J8 were indeed redundant on the AC Board.
New design:
Bildschirmfoto 2023-03-12 um 15.04.38.png
NB: The new tab where the Steve Jobs face is located prevents the board from rotating once installed in the case (because there is only one mounting hole (Earth), I needed a bit more friction.
 
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WillJac

Well-known member
DC Board Update

Wirewound resistor (Digikey Link, I just bought one from Farnell, also available on Mouser but not on Arrow at the moment)
+ Can be placed anywhere (not only on the PCB itself). Ideally close to the fan where it does not interfere with the PSU's heatsinks.
+ Should be way over dimensioned. Which means it should not overheat! Dissipated power for 12V => 7,2W, capable of up to 25W with a proper heatsink or 12W in the air...
+ Can be secured (needs to be verified!) with a thermal adhesive instead of screws and compound. I've found this on Amazon in Germany.

I have ordered the parts and will test them with a power brick. Should not heat up that much if I'm not mistaken.
Also added a couple of holes for "cable management" -- a zip tie should be able to keep that mess of molex cables "tidier"

View attachment 53551

Being sick I can't move much from the laptop... but I've found a few pics that confirm that J7 and J8 were indeed redundant on the AC Board.
New design:
View attachment 53553
NB: The new tab where the Steve Jobs face is located prevents the board from rotating once installed in the case (because there is only one mounting hole (Earth), I needed a bit more friction.
I like this very much and thanks for the replies to my messages. I will wait for you to have a final working version that you are satisfied with before I order boards. I have most of the parts and seems you have removed some items. This makes it great. My concern, in my PM to you, was about the other J connections as I could not see where they would go but now I see that they are all removed. I have a few of the previous version boards but I will dispose of those as they are not really valid anymore with the issues you have solved in this new version.
 
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