this post was submitted on 22 Jul 2024
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cross-posted from: https://lemmy.world/post/17754693

I learn more about cables in this channel every week. Just wanted to share

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[–] [email protected] 39 points 3 months ago (1 children)

Yall just ruining the U in USB.

[–] [email protected] 3 points 3 months ago

Yeah, it's not really getting easier...

[–] [email protected] 20 points 3 months ago (3 children)

I ended up just buying a tester

[–] [email protected] 18 points 3 months ago (1 children)
[–] [email protected] 5 points 3 months ago

This is the one I bought

Treedix USB Cable Data Line Test Board https://a.co/d/15h4lEh

It's a bit of a pain to learn what means what, but once you read up on it, it's pretty straightforward.

[–] [email protected] 5 points 3 months ago

Interesting, any you recommend or are currently using?

[–] [email protected] 3 points 3 months ago* (last edited 3 months ago)

Same. Mine is made by Treedix.

$17 on Amazon.

It is great at determining the technical limits of a cable. To read the test you have to practice a lot or reference a chart that was confusing to me.

It does not tell you whether the cable functions, only what its technical capabilities could be if it was working as intended. In other words, as I understand, it checks what pins are there on each side of the cable, not whether they are connected anywhere in the middle.

It's good for sorting through all the crap cables that accumulate and figuring out which ones can't do shit and which ones can stream high def video and power a small computer.

Some basic cables only have power, no data at all.

That's what's universal about USB, the ports and connectors, not the cables.

[–] [email protected] 8 points 3 months ago (1 children)

It gets worse, not all usbc ports are fully featured either.

[–] [email protected] 1 points 3 months ago

That's true, they explain this in a different video: https://www.youtube.com/watch?v=y9vXDy_zt4I

[–] [email protected] 7 points 3 months ago
[–] [email protected] 5 points 3 months ago

The video is in English and it's about how some cables support USB PD power negotiation better than others, it seems. I only watched a few moments.