Yes, you can bypass the 5V VREG with an external one. Before you do that, make sure there is no short between 5V and ground caused by the fried VREG. If there is, desolder the switcher. Make sure your external supply can source at least 1A. Your 3.3V VREG is probably OK. To my knowledge, the possible ways to fry the switchers are reverse voltage or over-voltage (even very short spikes). The latter may be caused by using Vin > 10V over long wires (high inductance).
On Wed, Jun 11, 2014 at 9:03 AM, Gustav Sohtell <[email protected]> wrote: > Hi! > > The same thing has happened to me to two of my IOIOs. They still work when > connected to my mac but neither 5V nor 3.3V rail has any voltage when power > is connected to VIN. > > I have two questions: > > Can I fix them by adding external 5 and 3.3V regulators so that they will > still work in host mode? (and check for heat) > I tried adding 5V and then connecting to an android tablet but that did > not seem to work. > > Does anyone have any guesses of how I might have broken them? In both > cases I'm guessing that I was connecting/disconnecting a USB cable to an > Android tablet. Could I have had a grounding error or something? > > Best regards, > Gustav > > Den lördagen den 5:e april 2014 kl. 16:33:14 UTC+2 skrev Lagz Moncs: > >> Okay I will try that, thanks. > > -- > 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.
