It hasn't been a good day for technology today [entries|reading|network|archive]
simont

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Wed 2006-07-26 19:57
It hasn't been a good day for technology today

At lunchtime I went to World of Computers and picked up a scanner, which I've been meaning to buy one of for some time and which I ordered at the weekend. When I got it home this evening I found that its USB cable was about four feet too short to reach from the only free surface in the study to the computer I needed to connect it to, so I'll have to go back and get an extension cable tomorrow.

Also this evening I managed, thanks to helpful advice from Ian, to debug the mysterious software crashes I'd recently been seeing on my main home machine. That caused me great relief and a sense of triumph for about five minutes. Unfortunately, the next thing that happened was that an incredibly loud, sharp and nearby crack of thunder and flash of lightning made me jump out of my seat, and when I settled down again I discovered that the machine whose software I'd just fixed had turned itself off and wouldn't turn on again. It just sits there with its power light glowing at half brightness, and does nothing else no matter how often I press the On button. For good measure, the same lightning strike also fried something in NTL's cable network or possibly my cable modem, because the latter is blinking some very unhappy-looking lights at me and not providing me with network connectivity. I'm having to type this from the Gallery.

So, that's two counts of nearly getting something working in one day. I'd probably better not go near another computer until tomorrow.

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[personal profile] fanfWed 2006-07-26 22:14
There's no such thing as a USB extension cable, though you can get single socket hubs with long leads....
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[identity profile] mpinna.livejournal.comWed 2006-07-26 23:22
Apple make something that looks an awful lot like one. But it only works with the particular bit of hardware it was designed for - they ensure this by putting a sticky out bit on the extension cable which is matched by a notch on the plug on the extendable device - this way they ensure that only the right device gets extended, and the combination of the two has presumably been tested against the spec.

Having said that every type of USB wifi adapter I've every bought (a lot) has included a non-fudged extension cable, though presumably these cables themselves are out of spec. (The combination of adapter + cable may be within spec but this kind of approach hardly gives confidence that this might be the case.)
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[identity profile] shadowphiar.livejournal.comThu 2006-07-27 13:18
Would a cable containing a one-port hub reduce the power available to devices deeper in the chain?

Normally a hub isn't able to power another hub, but you can run devices (e.g. a mouse) off the hub in the keyboard, even if the keyboard is itself attached to the computer via one of these extension cables.
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[personal profile] simontThu 2006-07-27 08:07
As it turned out, Owen had a spare USB cable longer than the one that came with the scanner, which I'm now successfully using as a replacement rather than an extension, and the scanner does work. Phew. That only leaves the fried computer and the non-functional broadband...
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