The failing of the VREG has nothing to do with firmware. It may be caused by a momentary reverse voltage or high voltage spike. It may also happen when connecting to a very beefy power supply of >10V over long wires, which is apparently not your case. It is likely that what got damaged is the TPS62130 chip (the little square one close to the JST connector). It can be replace with some reasonable soldering skills and equipment. Alternatively you can bypass the regulator and supply 5V directly to the 5V rail, but make sure to measure resistance there before doing that to make sure the VREG doesn't short.
Are you positive that the firmware upgrade worked? You can also try to install the V3 firmware again and see if this changes anything. On Tue, Aug 19, 2014 at 10:40 PM, <[email protected]> wrote: > So, what can I do with fried voltage regulator ? Is my board useless now, > because it cannot be powered ? I use standard 9V battery connected to GND > and VIN pins. > The board was Ok before this failed firmware upgrade attempt. I only tried > to use the latest versions, but it seems that firmware upgrade is too risky. > The board cannot communicate with PC in application mode, only with > bootloader. So I cannot verify what firmware version there actually is. > > keskiviikko, 20. elokuuta 2014 6.12.07 UTC+3 Ytai kirjoitti: > >> The red light light indicates power. It is not under software control. >> Seems to me like you've got a fried voltage regulator on the IOIO and the >> IOIO works with a PC because this bypasses this regulator. >> The version check with IOIODude needs to be done with the IOIO in >> application mode if you want to know the application version. The output >> you've attached is the bootloader version which is not expected to change >> in this case. >> >> -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
