Everything you're describing sounds legit. Good catch on pin 30, I failed to notice that. It seems like your on-board VREG failed (it is bypassed when connected to a PC, that's why your red LED turns on then). I don't know why it did, a 9V source should not be able to cause that. The failures mode that I'm currently familiar with on the VREG are either reverse polarity or over voltage (which may caused by a voltage surge, when connected to a >10V source over long wires).
On Thu, Dec 19, 2013 at 8:02 AM, Mark Thrasher <[email protected]>wrote: > 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]>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]. >>> 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. >>> >> >> -- > 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. > -- 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.
