Andy Green wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Somebody in the thread at some point said: > | 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? > > No there's no real hardware fix that's practical. > > We could have done something extreme like PWM the enable by software in > FIQ ISR, but it would result in dim AUX LED even so, since the LED is > not seeing the excess current but just normally lit. > > It was fixed on A6, I'm afraid we just have to let it lie and not use > the AUX LED much as pointed out unless we're on external power.
Now that's an idea. How about using it as a battery charging indicator? the orange thing can be used for other purposes then. Helge Hafting _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community