[sdiy] USB-C experience

[Roman Sowa]

If you want to connect cabinets with multiple lines, then why not take 
advantage of over 150 years of experience in telecom industry and use 
pretty common, cheap 50-pair connector, I don't know how they are 
officially called, we used to call them "Amphenol" sometimes 
"Centronics". Like this one:

https://www.tme.eu/pl/details/ds1078-0150m0ls

Another option is good old SCART connector known from analog TV. Cables 
should be still around and very cheap. And most of the wires are shielded!

Not to mention round multipin connectors of various sizes, widely used 
in industry, military and aerospace, but the cable plus connectors for 
just one link may cost several hundred $.

But in terms of price and availability, I think nothing beats RJ45


Roman

W dniu 2023-09-29 o 22:31, Sean Ellis via Synth-diy pisze:
> (I made this post on wigglers but I'd like to share here. I'd love 
> some feedback from people who might have 
> opinions.https://www.modwiggler.com/forum/viewtopic.php?p=4036980 )
>
>
>
>
> I've spent the last few weeks investigating buss cables for running 
> between cabinets and I'll save people the trouble with USB-C. On paper 
> it could be handy being so small and so many lines, for CV it would 
> work but there are some showstopper issues.
>
> Firstly the connectors are SMT only, and even then virtually all 
> connectors have to go through an oven or hot air to make proper 
> joints. You can't physically get under them with an iron so are rather 
> unfriendly for even prototyping.
>
> Secondly there are approximately 9000 different footprints with little 
> in the way of a standard. Identical looking parts are off by 0.25mm 
> and don't fit.
>
> Third the reversible nature is a waste for us. You need to find a 
> solution for keying them to make use of the full cable. (design 
> specific...)
>
> Lastly, it's 24 pins! On paper 24 pins.....in reality it's 18 or less. 
> All the cables I've tested have *merged the power and ground lines 
> within the cable*. This is sadly not written in the spec so I wasted 
> money on boards that didn't account for that. I guess you could make 
> your own cables using the male plugin boards but what's the point.
>
> Stick to HDMI or another type even if only carrying CV. Wish they'd 
> mention somewhere in the spec that the power pins are merged as a rule.
>
>
> (There's more in the thread about the cable issue)
>
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