Norman Dunbar wrote, on 16/Oct/12 16:17 | Oct16:
Norman/
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.
You need a good ringlight magnifier and 1mm soldering iron.
That set-up, even with my old eyes, allowed soldering of the .5mm pitch
pins on Romdisq.
<snip>
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