Thank you! I'll try that. I have about two meters of 24V wire from power source, but I have a 7812 regulator on the circuit board with the IOIO. Perhaps I should add some capacitors to even out small ripples or even a 15V zener diode over the VIN.
Thanks! On Thu, Jun 12, 2014 at 6:20 AM, Ytai Ben-Tsvi <[email protected]> wrote: > 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 a topic in the > Google Groups "ioio-users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/ioio-users/RqHb02KU5G4/unsubscribe. > To unsubscribe from this group and all its topics, 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.
