On 16/10/2012 04:17, Norman Dunbar wrote:
Hi Bryan,
On 16/10/12 11:43, Bryan Horstmann wrote:
Somehow we've got into top reply, so I will follow. I've just realised
that one USB keyboard I have is a radio one so I get a bonus of keyboard
and mouse using only one USB.
Back to bottom posting! ;-)
You might have a problem with the USB stuff depending on the revision
on Pi that you get. The originals had a limit of 100mA per USB port
and some keyboards and/or mice drew more which caused a drop in the
voltage available on the board, which caused the Pi to either drop
key-presses
and/or auto-repeat at a million presses per micro-second!
Later models, even those prior to the new 512 Mb version, have had the
usb poly-fuses removed thus removing the limit, but if your power
supply is flakey in any way, it will still cause problems if too much
is drawn by the USB ports.
I've upgraded my own Pi by soldering a jumper over the two poly fuses.
Nice work if you have young eyes! Got there in the end though, and so
far, no problems.
There is a list of compatible USB keyboards and mice (amongst other
things) at http://www.elinux.org/RPi_VerifiedPeripherals.
Cheers,
Norm.
Hello Norman,
The wireless keyboard/mouse is battery powered within in the units, so
the only load is the wireless "dongle", which shouldn't take much.
Bryan H
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