Post AwFfaLqbxSX6QsPyue by fishidwardrobe@mastodon.me.uk
(DIR) More posts by fishidwardrobe@mastodon.me.uk
(DIR) Post #AwFMBipRTmZHL3PheS by foone@digipres.club
2025-07-18T04:33:28Z
1 likes, 0 repeats
I want someone to make a video series where they exceed cable lengths and show what happens.what happens if you have a 2km USB cable? what works and what breaks?
(DIR) Post #AwFML59hq1P3BrM4lE by psilocervine@gamedev.lgbt
2025-07-18T04:35:04Z
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@foone that'd be kinda really interesting? I imagine the biggest problem with Cables of Unusual Size would be things related to wire resistance but I fully admit I'm just guessing there
(DIR) Post #AwFMNmVnbxIuEjyZsm by gewt@san-junipero.gimme-sympathy.org
2025-07-18T04:35:17Z
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@foone two of the racks i'm in at FMT2 are doing 10gig copper via cat5e well beyond the limitsworks perfectly fine
(DIR) Post #AwFMU6lzC5AgoSZ2XI by Canageek@wandering.shop
2025-07-18T04:36:47Z
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@foone I also wonder if you could get past those limits with FANCY cables with extra shielding and better conductors and such
(DIR) Post #AwFMpZ2dHskYZEa78K by WizardOfDocs@wandering.shop
2025-07-18T04:40:33Z
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@foone at what point does lightspeed delay become a problem?
(DIR) Post #AwFNn3RdtM6HwmeA8e by websterleone@meemu.org
2025-07-18T04:51:24Z
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@foone Between resistance and capacitance your signal is gonna be smushed to hell and I bet a device wouldn't even recognize a start packet, and that's pretty much every modern connection standard. Not to mention you'll start picking up noise from powerlines at that distance. Digging back for RS-232 and RS-485 and other old buses might be more interesting. RS-485 theoretically supports up to 4000 feet at low speeds, so it's got a better chance with high quality cables, and you could maybe slow it down enough to overcome the capacitance issue, but that'd be pretty nonstandard UARTs. I feel like you'd get one good episode before it's just repeating, unless you cover other cable problems + things that cause signal integrity issues.
(DIR) Post #AwFO3wUL0dMjIKxbCS by StompyRobot@mastodon.gamedev.place
2025-07-18T04:54:29Z
0 likes, 0 repeats
@fooneAn old school USB 1.0 mouse, running at 1.5 megabit, might still work?The cable impedance is the big challenge...
(DIR) Post #AwFOduEqqq0Mk4rifA by artandtechnic@digipres.club
2025-07-18T05:00:52Z
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@foone Agreed, that would be interesting to see.At a former workplace, we had a number of overly long coax and ethernet runs, which we eventually had to test in order to determine exactly how usable they were for various projects. TL;DR: the higher-spec coax+ethernet cables enabled you to get a bit farther than the lower-end ones.With USB cables… who’s using higher spec wiring is a great question. There’s so much downward pressure on cost in that market.
(DIR) Post #AwFOiIOqxhcgprdY12 by faebudo@ioc.exchange
2025-07-18T05:01:21Z
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@foone 2km is really far of what is possible and the USB host or driver will just disconnect the device long before due to excessive retries.USB 2.0 will do about 5m (Full-/Hi-Speed), then the signal is too degraded for a reliable connection. With an active cable you can do 25m. For USB 3.1 this is 3m and 18m respectively. The same if you use Hubs, maximum length is the same due to signal run time.USB doesn't really have effective error correction, for example USB 3.2 allows 1 in 10^12 bit error on the cable before you get into trouble.If you want more you can use USB over Ethernet where the USB Host is in the adapter, but this is cheating as the USB part isn't really any longer.
(DIR) Post #AwFOiqdDgnJj0GcV84 by feld@friedcheese.us
2025-07-18T05:01:20.764738Z
1 likes, 0 repeats
@foone I do have evidence that Google Fiber does these experiments on customers without their knowledge
(DIR) Post #AwFOjtfbsSqoiVEpNY by RueNahcMohr@infosec.exchange
2025-07-18T05:01:27Z
0 likes, 0 repeats
@foone I'v seen overlength network cables.
(DIR) Post #AwFROLWxuaDkcHbtSq by gunstick@mastodon.opencloud.lu
2025-07-18T05:31:39Z
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@foone 10m HDMI cable: laptops continue to work, except Apple products. Probably because of the 10cm long DP-HDMI adapter.
(DIR) Post #AwFT0SKr9zcqgAgMq0 by cricalix@mastodon.ie
2025-07-18T05:49:45Z
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@foone I am tangentially reminded of https://www.revk.uk/2017/12/its-official-adsl-works-over-wet-string.html where they proved ADSL signals work over wet string.
(DIR) Post #AwFYFtbqXP2JNmoL5c by babble_endanger@freeradical.zone
2025-07-18T06:48:30Z
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@foone Had a computer at one job that was powered off of basically USB power (5 volts, couple amps, little SBC)We needed a longer cable and customer advised that AC extension cords were categorically a fire hazard. I advised my boss that all things equal, 20 more feet of low-current was safer than 20 more feet of 2 amps.Customer didn't budge, we tried to run 5 volt lines 20 feet (or 10 or whatever)Had to buy VERY thick wires. 5 volts does NOT want to go far through copper.
(DIR) Post #AwFZ9sI0dGZlVPE0Z6 by torgeros@norden.social
2025-07-18T06:58:37Z
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@foone @psilocervine LTT made a video on this some time ago, still enjoying to watch.https://www.youtube.com/watch?v=p9nqQuu4lmQ
(DIR) Post #AwFZKocKcrghIlwoN6 by billgoats@bitbang.social
2025-07-18T07:00:38Z
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@foone I need to get a portable power supply at some point so we can discover how far along the barbed wire fence I can convince the network to run… https://bitbang.social/@billgoats/114783670173518561
(DIR) Post #AwFfaLqbxSX6QsPyue by fishidwardrobe@mastodon.me.uk
2025-07-18T08:10:42Z
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@foone I'd watch that!
(DIR) Post #AwFgcOkYEqBTy17iHQ by Sable_Shade@mastodon.social
2025-07-18T08:22:23Z
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@foone The price goes up because no ones got usb cables to sellStop it
(DIR) Post #AwFvaqimliIFS717Pk by effika@mastodon.social
2025-07-18T11:10:05Z
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@foone I know for hdmi it just doesn't function. Work decided to move a projector and the cable run became 75' using a bargain-bin cable... they didn't believe me that it stopped working because it was Too Long and that we needed a better cable & booster. They called in a $$$ person to tell them the same thing.
(DIR) Post #AwHtWtlvfmoQACOasS by vxo@digipres.club
2025-07-19T09:08:01Z
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@fooneI have seen HD-SDI right on the edge of breaking and it's so glitcheriffic.