> > > *Gerald - Assuming I just killed the AM335, would most of the other > components on the board be okay, aside from possibly the Power Management > chip?*
I cant tell you what Gerald can most definitely he knows the hardware better than I. However I can tell you if you have another board of some type that does I2C, perhaps even another beaglebone black, *maybe* you can tap into the I2C bus lines, and see if the PMIC responds. But . . . the fact that you say all LEDs went out my first instinct would be to say that the PMIC is fried too. If it was still functional the LED should at least come on for a second or two. But I do not know that 100% or not. On Mon, Jun 6, 2016 at 2:15 PM, Doyle S <[email protected]> wrote: > Thanks all! > > No doubt it was my fault - I'm not trying to blame anyone else, I was more > curious about what I did to my board. =) > I had a couple other BBB's around so I was a bit cavalier with the whole > thing - lesson learned, haha. > > I really appreciate all the info, and will check all the suggested reading. > > Gerald - Assuming I just killed the AM335, would most of the other > components on the board be okay, aside from possibly the Power Management > chip? > > > > > On Monday, June 6, 2016 at 10:12:43 AM UTC-7, Doyle S wrote: >> >> Hi, >> >> Yesterday I was trying to use some of the analog inputs on the BBB to >> read my photodiode, and instead, I think I blew up the power supply on my >> board. >> With power applied, I get no PWR led, so I'm pretty certain it's dead. >> Short of replacing the power management chip, is there anything I can >> do/replace to get the board working again? >> >> >> Brief Background >> >> I hooked up the photodiode to an Arduino and was able to read 0 - 5V >> easily, so I wanted to do the same on the BBB. >> I read some of the materials re: AIN on the BBB, but apparently I missed >> all the references to the max voltage of 1.8V! >> I started by enabling the analog inputs on the BBB, and started with AIN0. >> >> With nothing attached, I was reading about 0 - so far, so good. >> Then I figured I'd try to see what a full 5.0V read out, so I plugged in >> the VDD 5V to AIN0, and all the LEDs went out instantly. >> Now all LEDs stay off, even the PWR LED, when power is applied. >> >> No doubt, it was stupid, but I have a few additional takeaways - >> 1. Very minor references in most BBB documentation/webpages discussing >> Analog Inputs and max voltages. >> Coming from working with Pi's and Arduino's, it was common to have analog >> inputs range from 0 to 5V, so the 1.8V was unexpected. >> >> 2. Isn't there any protection at all from this kind of damage? Or was >> the main problem that I used the VDD 5V and fed it into the AIN0 port? >> Would I have killed it if I used the VDD ADC instead of the VDD 5v or >> would using the VCC ADC possibly have protected it? >> >> 3. What is the "normal" way of using the BBB analog inputs with 5V >> levels? Is it possible - or is there where I would use a level-shifter or >> zener diode? >> >> Thanks for the any comments or additional info provided! >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/8b780479-5694-4cc5-8f60-17e9bdfd8ec5%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/8b780479-5694-4cc5-8f60-17e9bdfd8ec5%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORr_W3PcESWRJCb_oHs0JjiJvk%2BD6U7a9nW5N%2BB6R5bmRw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
