[PD] pduino/comport w/ arduino freezes keyboard and trackpad on Macbook

[Hans-Christoph Steiner]

The arduino draws very little power, probably less than 100mA, any  
USB bus should power it fine.  A short circuit will shutdown any USB  
bus.  It could shutdown a poorly implemented USB bus forever.

The problem you describe sounds a lot like an intermittent short  
circuit to me.  It could also be the motor drawing too much current  
under certain conditions.  If running a motor, I'd run an external  
power supply.

.hc

On Oct 16, 2006, at 10:59 PM, David NG McCallum wrote:

> Drawing too much power might have had something to do with a motor I
> was running. But I had no problem with the motor using my own arduino
> code.
>
> The situation with mis-wiring the pot was independent of the comport
> object freezing my kbd and mouse, though. The kbd and mouse froze when
> everything was wired up fine (which worked w/ my own arduino code,
> just not with comport).
>
> It's now mysteriously worked, the last time I tried it, but the wiring
> was all the same as before. So I have no idea, now that it's not
> really reproducible...
>
> D
>
> On 16/10/06, nick weldin <nick at padarts.idps.co.uk> wrote:
>>
>> If drawing to much power from the usb socket is the problem then you
>> need to provide power for the arduino either by going through a
>> powered hub, or if you are drawing to much power on the arduino to
>> run it off usb switch the power jumper over on the board and provide
>> power for the electronics on it seperately, rather than drawing it
>> from the usb bus.
>>
>> HTH
>>
>> Nick
>>
>> >Hi HC,
>> >
>> >I've had the problem of the USB bus being killed because to much  
>> power
>> >was drawn, but it was because I plugged a pot into the wrong ports.
>> ...snip...
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