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by catlifeonmars 1905 days ago
IIRC the major innovation for USB-C is to put the spring loaded component into the cable rather than the device. This is brilliant, since springs wear out over time and it’s much easier to replace a cable than a device in most (all?) situations.
2 comments
majewsky 1905 days ago
Micro-USB-A also has the movable part in the cable (the two little teeth on the flat side). You might be thinking of Mini-USB-A.
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catlifeonmars 1905 days ago
Yes I was wrong. I assumed that micro usb A and B did not spring components in the cable. It’s only the pre-micro usb cables lack this improvement.
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danaris 1905 days ago
The problem with the ports isn't (in in my experience) with spring-loaded components wearing out: rather, like ceejayoz said, I've seen a number of cases where the port just...moves around inside the device, so that you can't plug the cable in properly. Either it gets offset, so that the port is simply inaccessible through the slot in the case, or pushing in on it just makes the port itself push further into the case. (In that case, one can generally force it in a few times before things start to really break within the case.)

I know of no specific reason why this should be more common with micro-USB than with other connectors, but I've only seen it happen with micro-USB in person.

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XorNot 1905 days ago
It's more likely the solder is cracking off the PCB. Jiggling the port around forces it back into good contact and it'll sporadically work.

The real problem is we don't bolt the ports to the chassis in most cases, we just put them on the PCB with little bracing them in the direction of applied force.

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catlifeonmars 1905 days ago
As it turns out, this is addressed in the class specification. I wonder if it’s the spec that’s deficient or whether the devices in question are non compliant.

See page 40: https://www.usb.org/sites/default/files/CabConn20.pdf

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tekromancr 1904 days ago
My first "hack" as a teenager was soldering a USB cable into the place the USB mini port was on a palm I was using as an ereader. The port would just become detached from the board if you looked at it funny; so this worked pretty well. I could just plug the whole device in to charge from then on.

Then I realized that the three volts that were supplied from a pair of AA batteries was really more of a suggestion. That summer, lots of gadgets I had became "USB powered"

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