All, Ytai responded in a pvt message that some other people have reported this too. His response is -- " It seems like the sudden outgoing current pulse on VBUS can sometimes damage the switcher". Apparently folks from SeeedStudio are looking at it too.
Will keep you updated, if I hear anything more. For now I am hoping that creating a separate circuit to get the android device separate power (directly from input power, which in my case is going to be 5v) is going to solve this rare problem. Request for Ytai. You had indicated that we have the spots to get D+ and D- which we can get into another board using pogosticks. Will it be possible to get them in one of the Pins? That way we could simple take those (D+ and D-), the voltage and gnd to our own USB female slot in an external board? Being new I am not sure how difficult and rugged a pogo stick with be... especially when used in a automotive application. This also (IMO) will isolate the power circuit and MAY not cause the above problem. Best regards RK On Monday, October 6, 2014 6:41:35 PM UTC-4, [email protected] wrote: > > Team > I think I just 'fried' three ioio boards in one evening. I have been > working with these for over 6 months and never had a problem. But i was > working on "lab settings" and and we were testing our programs > > Today I tried to connect and disconnect multiple times to make sure my > program was working and RIGHT as i was connecting or disconnecting the > tablet the devices powered OFF and I have not been able to power them on. > Also while connecting and disconnecting it was fine the few times but then > power off. Few more info > 1) I was originally connecting wires to VIn and GND and connecting it to a > 5v wall charger (or to a laptop 5v). I blew two of them on this setup. I > thought the wires shorted > 2) Next I used the JST connector and gave it 12 v (again from wall > charger) and didnt use any "naked" wires. After connecting and > disconnecting a tablet a few time this blew up too. > 3) Board is connected to tablet using the Red USB wire from sparkfun > > Best Regards > RK > > > > > -- 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.
