Re: No More USB-A Ports

On 2024-06-08, Computer Nerd Kev wrote:

Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

The machine I'm using right now, which is just about a year old, is
practically overflowing with USB-A ports. But it only has one USB-C
port. How long has USB-C been around?

>
In my house just a couple of weeks - I used my first USB-C device
last month, via a cable to a USB-A plug. Another flimsy little
connector that I'm likely to break, like devices with MicroUSB
connectors, when I accidentally catch the cable with my arm and
yank them about.
>
The USB-PD standards are interesting. Upon first reading about them
I was keen to find/design a device to just break out the outputs
and have a mini variable power supply for general use, even battery
powered from one of those power bank devices. But as with most
things USB3/C it turns out the power supplies that are actually
available only implement the bare minimum range of voltage outputs
that the manufacturers think most people will need.

Mine here are all 5/9/15/20V.  I "think" they're missing only 1 or 2
voltages, but that's enough for my laptops and cell phones.  Not really
sure what'd ask for 9 or 15 volts ...

Bear in mind that it's ONE output, and you negotiate the voltage on the
wire as part of the connection handshaking (IIRC CC1/2 or maybe
something more active later on, been a bit since I read up on how PD
works)


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