Pulster fixe(s) and rework

Thomas B tommy.b at gmx.net
Thu Mar 5 03:52:46 CET 2009

On Thu, Mar 05, 2009 at 01:19:07AM +0100, Fox Mulder wrote:
> Andy Green wrote:
> > Johnny Tenfinger is right despite it sounds strange.  On some or all A5s
> > there is no base current limit resistor on the bipolar transistor used
> > to light the AUX LED.
> > 
> > This "50mA" fault current then flows not through the LED (which has a
> > reasonable series current limit resistor), but through the GPIO IO cell
> > and the driver transistor base.
> If this is the problem than it really is a bad design flaw...
> Maybe i should test the AUX LED on my gta02v5 how much current it uses
> when it is on.

Ouch. I just tested mine, and the AUX LED really uses that much (about
50mA). Does a SOP exist to fix this?


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