68kMLA Classic Interface
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| Click here to select a new forum. | | 10 Pin Mac II PSU ATX adapter or replacement PS? | Posted by: bmwcyclist on 2025-11-02 04:58:32
Does anyone still sell IIsi / 10pin PSU ATX adapters or replacement PSUs?
I can't seem to find any, all the links are dead. | Posted by: Melkhior on 2025-11-02 05:19:05
Adapter: depending on where you live, might be faster/cheaper to just make your own. My version is here; other people have rolled out different solutions. Mine is mostly SMD (had them done by JLCPCB), I soldered the two connectors by hand (There's a picture). It has a power-good led and a small switch to select between soft-power and always-on (in case the soft-power circuitry on the motherboard is flaky). | Posted by: bmwcyclist on 2025-11-02 05:24:54
What did JLCPCB charge you? So they did everything other than the two connectors? | Posted by: Melkhior on 2025-11-02 05:40:29
At the time (Feb'23), the command history says $24.75 for 5 populated boards, including custom/duties to France. No memory how that translated into euros at the time.
Yes, they did all the SMD stuff (passives, the gate, the small switch), I bought the actual connectors for both sides from Mouser IIRC. That's the most expensive part - connectors are never cheap :-/
BTW license on that is CC BY-SA 4.0, so apart from "credit where credit is due", you can do whatever, including reselling excess inventory if you decide to make some for yourself. You also have the full schematics/pcb files (Kicad) if you want do double-check things or do them differently. | Posted by: bmwcyclist on 2025-11-02 05:45:54
At the time (Feb'23), the command history says $24.75 for 5 populated boards, including custom/duties to France. No memory how that translated into euros at the time.
Yes, they did all the SMD stuff (passives, the gate, the small switch), I bought the actual connectors for both sides from Mouser IIRC. That's the most expensive part - connectors are never cheap :-/
BTW license on that is CC BY-SA 4.0, so apart from "credit where credit is due", you can do whatever, including reselling excess inventory if you decide to make some for yourself. You also have the full schematics/pcb files (Kicad) if you want do double-check things or do them differently.
What do I have to send to JLCPCB?
I am a network guy, not a modern HW component guy 😉 | Posted by: Melkhior on 2025-11-02 06:26:41
Normally, JLCPCB needs the gerber files (to make the PCB), a BOM (bill of material, the list of components you need), and a placement file (so the pick-and-place machine places the components in the right place for soldering).
In my repo, the required files for the PCB should be in IIci_ATX.zip, the BoM in IIci_ATX_jlcpcb.csv, and the placement file in IIci_ATX-all-pos-jlcpcb.csv.
However, those are old files and the format(s) might have changed since Feb'2023. The placement is occasionally misaligned/rotated between KiCad and JLCPCB, so double-checking is always needed (almost everything I've made at JLCPCB required some fixing in their interface post-upload...). And the components in the BoM may or may not be available and/or cheap anymore. You can't just upload the files to JLCPCB and hope for the best :-(
OTOH, having things made by JLCPCB it's a useful skill to have in our hobby, and this is a fairly cheap/simple project to manufacture so might be worth the risk. I do recommend strating from the KiCad project and redoing the intermediate steps yourself to ensure you understand what's required for manufacturing at JLCPCB. | Posted by: Miata26 on 2026-01-01 13:47:56
@bmwcyclist, I'm looking into the same thing. My IICI is in good shape, but there's a couple of leaky caps in the PSU. Have you looked into getting some built yet? | Posted by: bmwcyclist on 2026-01-01 13:55:07
@bmwcyclist, I'm looking into the same thing. My IICI is in good shape, but there's a couple of leaky caps in the PSU. Have you looked into getting some built yet?
I ended up buying a powersupply kit from CayMac and building it.
He has the store closed while traveling. I think they will be available again in a month or so. | Posted by: Miata26 on 2026-01-02 21:47:28
I ended up buying a powersupply kit from CayMac and building it.
He has the store closed while traveling. I think they will be available again in a month or so. Thanks, I'll see what they have available. | | 1 |
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