I will explain to you my system and maybe you can tell me if there is a better way to do it with the IOIO. For now, I am powering the IOIO with a 9V wall adapter. I'm relying on it's own onboard voltage regulator to manage the voltage. For my potentiometers, I built a voltage regulator using a LM317. I chose resistors such that the regulated voltage is 3V. I'm using this 3V as the reference for the linear potentiometers. I just wanted to make sure the ADC channels never saw more than 3V. Right now, everything is connected on a breadboard. That is basically it...a fairly simple setup. I will be reading as many as the max 16 channels for ADC. I did realize why the board was freezing when I connected to pin 30...pin 30 is not an analog input channel. I thought the corner pin was 30, but instead it is 31. So, the analog channels are 31-46. As for why the board quit working (or it's onboard voltage regulator quit working), I don't know.
On Wednesday, December 18, 2013 9:36:18 PM UTC-6, Ytai wrote: > > Red light not on = either a power supply problem or a damage to the board. > How are you powering the board? > Which firmware version is it running? > What's connected to the board exactly? > How are these potentiometers wired? > > > On Wed, Dec 18, 2013 at 3:27 PM, Mark Thrasher > <[email protected]<javascript:> > > wrote: > >> It seems I've been chasing problems all day. The first problem was the >> IOIO working fine for my Nexus 7 tablet with Android 4.4, but not working >> for my Note 3 device with Android 4.3. I made sure debugging was turned >> off and ran the exact same apk on each device. I still don't know what is >> up with that. >> The next problem seemed to be hardware related. If I tried to do an ADC >> on pin 30, my program would freeze. I was converting 3 different signals, >> and tried using pins 30, 31, and 32. It never worked. When I tried using >> pins 40, 41, and 42, everything worked fine. When I tried using pins >> 31,32, and 33, I could move one potentiometer and it would affect one of >> the other channels that had a constant voltage on it. None of it made any >> sense to me. After experimenting around with the different pins, the red >> light on the board went out and I could no longer connect to it. I know >> the LED still works because I attempted reloading the firmware and the red >> and yellow lights behaved as expected. Anybody have any ideas what was >> going on with all of this? Anything I can test or do I accept this is a >> bad board now? >> >> -- >> 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] <javascript:>. >> To post to this group, send email to [email protected]<javascript:> >> . >> Visit this group at http://groups.google.com/group/ioio-users. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- 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/groups/opt_out.
