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.

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

What?