"Fredxx" wrote in message
...
On 22/02/2021 21:18, Rod Speed wrote:


"Brian Gaff (Sofa)" wrote in message
...
The whole point though is for that to also be a charger, though I have
to say I'm not greatly impressed with their efficiency.

One thing I have also found is that for example, if I use it to power
some dongle on my TV, all sorts of crud gets into the supply and power
wall warts are better, but don't use the el cheapo ones as they
generally buzz or create excessive RFI or both.

As for controlling them on or off. The guy who built my machine said it
was a series of jumpers on the mother board, but I never asked him where
they actually were, sorry!

That’s not for having it off when the system is turned off,

It's very common for motherboards to power USB ports when the computer is
shutdown, as long as power is going to the PS. The PS would normally have
an output labelled +5VSB or similar.

No news and irrelevant to that comment to Brian.

just for enabling or disabling it and which connector it
comes out on when you don’t want it on the back panel.

What?

Most of the USB ports are on the motherboard itself,
and are on the back of the case when the motherboard
is mounted in the case. It is more convenient to have
at leas some USB ports on the front of the case and
most motherboards do have stakes on the motherboard
that the computer end of the front USB port cable(s) can
be plugged into.