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PSU board connector measurements
Posted: Tue Oct 13, 2020 8:13 pm
by robcfg
Hello everyone!
Does anyone know the measurement of the pins or the type name of the connector that goes from the PSU board to the main board?
I'd like to experiment with a Mean Well PSU I bought that supplies +5, +12 and -12V, which is ideal for my Dragon 64.
Thanks a lot!
Re: PSU board connector measurements
Posted: Sat Oct 17, 2020 12:52 pm
by sorchard
Hi Rob!
The power connector looks like a fairly standard 9 way 3.96mm pitch with 0.8mm square pins (sometimes 1.13mm round pins)
These should be compatible with something like Molex KK 396 series. There is a large choice of parts and it's a bit of trek through the datasheets to find parts that go together:
e.g.
Pin header
https://www.molex.com/molex/products/pa ... 0026481091
Crimp housing
https://www.molex.com/molex/products/pa ... 0009508090
Crimp (You may be able to solder to these if you don't have a suitable crimp tool)
https://www.molex.com/molex/products/pa ... 0455703002
Pre-crimped lead (very convenient)
https://www.molex.com/molex/products/pa ... 0797582145
Example sources in the UK, though I imagine you would be able to find them closer to home:
https://uk.farnell.com/molex/26-48-1091 ... dp/3051103
https://uk.farnell.com/molex/09-50-8091 ... dp/3221693
https://uk.farnell.com/molex/45570-3000 ... dp/3215851
https://uk.farnell.com/molex-brad/79758 ... dp/3289582
Actually these longer pre-crimped leads might be better because you can cut them in half to make two:
https://uk.farnell.com/molex-brad/79758 ... dp/3289583
Please double check that the parts go together before you order them. Good luck with the PSU
Re: PSU board connector measurements
Posted: Sat Oct 17, 2020 2:30 pm
by robcfg
Re: PSU board connector measurements
Posted: Sat Oct 17, 2020 3:37 pm
by sorchard
They look like they will work. Or at least the datasheets refer to each other, so fingers crossed
Having separate 4 and 5 way connectors does sound like a good idea though I'm not sure if they will both fit at the same time unless you bend the pins or trim the housings. If you look at the width of the web between the contact openings in the housing, this would be doubled for two connectors side by side, plus there are some features at the top of the housing that would also interfere.
Re: PSU board connector measurements
Posted: Sat Oct 17, 2020 4:22 pm
by sorchard
Might be worth checking ebay too. Plenty of hits for Molex KK 396.
Re: PSU board connector measurements
Posted: Sun Oct 25, 2020 11:24 pm
by robcfg
I realised that I could partly use an ATX psu connector, so I used that and managed to get it working!
I'm quite happy with the result as I don't depend anymore on an external transformers, and got a composite video cable integrated on the Dragon, so now it's really plug'n'play
Plus, it's 100% reversible, no permanent modifications.
And now some pictures for your delight:
- IMG_2464.jpg (277.57 KiB) Viewed 16300 times
- IMG_2465.jpg (237.1 KiB) Viewed 16300 times
Thanks a lot for your suggestions!