From: Matthew <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Thursday, October 23, 2014 at 4:19 PM To: "[email protected]" <[email protected]> Subject: Re: [beagleboard] Analog pins spike suddenly to 1.8V
> Hi Gerald, > > It is stated many times that the maximum voltage for the analog inputs is > 1.8V, will a zener diode of 1.8V be enough to protect the analog input ? > > The chip will need a little head room above 1.8V (say 0.05V or so) for a 1.8V > zener to protect it. Is there a little bit of head room above 1.8V where the > input would be saturated, but chip will not be damaged? > > 100omh > ___ /\ /\ /\ /\________________________________ AIN[X] > \/ \/ \/ \/ | > ___|__/ > / /\ 1.8V Zener > /__\ > | > ______________________________|____________________ AGND > The zener will start to conduct near 1.8V so the accuracy of your analog inputs will be affected. It is better to use a diode with a small volt drop (Schottky or something equivalent) with the anode connected to the AIN and the cathode connected to the analog supply 1V8 rail. The processor will normally have an internal diode doing the same thing, but the current capabilities will be limited. By placing a fast low volt drop diode in parallel will help protect the analog input. A small capacitor (10nF ceramic 0402) between AIN and AGND will help slow the input pulse and give the diode time to respond. Regards, John > > Thanks, > Matthew > > > On Thursday, June 20, 2013 9:10:10 AM UTC+10, Gerald wrote: >> OH, eventually it will burn out and the processor will need to be replaced. >> If that is likely to happen, you may want to consider a voltage divider and a >> zener diode. >> >> Gerald >> >> >> On Wed, Jun 19, 2013 at 5:52 PM, Arnaud Soyez <[email protected] >> <javascript:> > wrote: >>> I think the voltage on the analog pin to the light sensor may have >>> been > 1.8V (probably around 3V) when too much light was coming in. >>> What do you think would happen on the ADC in that case? Wouldn't it just >>> fry? >>> I redid my whole circuit and so far all tests are good. >>> >>> >>> >>> 2013/6/19 Gerald Coley <[email protected] <javascript:> >: >>>> > Not likely. >>>> > >>>> > Gerald >>>> > >>>> > >>>> > >>>> > On Wed, Jun 19, 2013 at 2:48 PM, Weboide <[email protected] >>>> <javascript:> > wrote: >>>>> >> >>>>> >> Would there be any problems with the two sensors sharing the same AGND? >>>>> >> Can noise propagate through the GND pin? >>>>> >> >>>>> >> >>>>> >> On Wednesday, June 19, 2013 11:46:19 AM UTC-4, Gerald wrote: >>>>>> >>> >>>>>> >>> Put a storage scope on the analog signal and capture it to check the raw >>>>>> >>> data being fed into the inputs over time. >>>>>> >>> >>>>>> >>> You can also connect the scope and expose your sensor to various >>>>>> light >>>>>> >>> levels and see what the output does,. >>>>>> >>> >>>>>> >>> Gerald >>>>>> >>> >>>>>> >>> >>>>>> >>> On Wed, Jun 19, 2013 at 10:29 AM, Arnaud Soyez <[email protected]> >>>>>> >>> wrote: >>>>>>> >>>> >>>>>>> >>>> Yes I did, that's why I picked those, since I didn't use the touch >>>>>>> >>>> screen controller. >>>>>>> >>>> >>>>>>> >>>> Do you think that for example when the light sensor is in direct >>>>>>> >>>> sunlight there is a lot of noise coming in and messing up the ADC? And >>>>>>> >>>> you think using a pullup or switching to a higher pin would solve >>>>>>> >>>> this? >>>>>>> >>>> >>>>>>> >>>> Just trying to understand what I am doing wrong and what my >>>>>>> solutions >>>>>>> >>>> are. >>>>>>> >>>> >>>>>>> >>>> 2013/6/19 Gerald Coley <[email protected]>: >>>>>>>> >>>> > Yes. >>>>>>>> >>>> > >>>>>>>> >>>> > It is for the Touch Screen Controller mode which is the primary >>>>>>>> >>>> > function of >>>>>>>> >>>> > this interface.. Have you looked at the TRM? >>>>>>>> >>>> > >>>>>>>> >>>> > Gerald >>>>>>>> >>>> > >>>>>>>> >>>> > >>>>>>>> >>>> > >>>>>>>> >>>> > On Wed, Jun 19, 2013 at 10:14 AM, Arnaud Soyez >>>>>>>> <[email protected]> >>>>>>> >>>> >>>>>>>> >>>> > wrote: >>>>>>>>> >>>> >> >>>>>>>>> >>>> >> You mean the same setup but different pin for my temperature sensor? >>>>>>>>> >>>> >> How would a pullup help in analog? >>>>>>>>> >>>> >> >>>>>>>>> >>>> >> 2013/6/19 Gerald Coley <[email protected]>: >>>>>>> >>>> >>>>>>>>>> >>>> >> > You have the ability in the processor to connect AIN0-3 to a >>>>>>>>>> >>>> >> > pullup. It >>>>>>>>>> >>>> >> > is >>>>>>>>>> >>>> >> > used in TSC mode. Move to a higher AIN number and see if the same >>>>>>>>>> >>>> >> > thing >>>>>>>>>> >>>> >> > happens there. >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > Gerald >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > On Wed, Jun 19, 2013 at 9:58 AM, Arnaud Soyez >>>>>>>>>> >>>> >> > <[email protected]> >>>>>>> >>>> >>>>>>>>>> >>>> >> > wrote: >>>>>>>>>>> >>>> >> >> >>>>>>>>>>> >>>> >> >> P9_38 and P9_40 for reading ADC. >>>>>>>>>>> >>>> >> >> >>>>>>>>>>> >>>> >> >> 2013/6/19 Gerald Coley <[email protected]>: >>>>>>> >>>> >>>>>>>>>>>> >>>> >> >> > Could be. Which pins are you using? >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > Gerald >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > On Wed, Jun 19, 2013 at 9:43 AM, Weboide >>>>>>>>>>>> <[email protected]> >>>>>>> >>>> >>>>>>>>>>>> >>>> >> >> > wrote: >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> Could it be related to >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> http://hipstercircuits.com/noise-on-the-analog-pins-causes-the-adc >>>>>>>>>>>>> -sampler-to-go-out-of-whack/ >>>>>>>>>>>>> >>>> >> >> >> ? >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> On Wednesday, June 19, 2013 10:40:01 AM UTC-4, >>>>>>>>>>>>> Weboide wrote: >>>>>>>>>>>>>> >>>> >> >> >>> >>>>>>>>>>>>>> >>>> >> >> >>> Yes, using ADC ground for both. >>>>>>>>>>>>>> >>>> >> >> >>> >>>>>>>>>>>>>> >>>> >> >> >>> The TMP36 is connected to 5V DC though (but should always >>>>>>>>>>>>>> >>>> >> >> >>> return <= >>>>>>>>>>>>>> >>>> >> >> >>> 1.8V). >>>>>>>>>>>>>> >>>> >> >> >>> >>>>>>>>>>>>>> >>>> >> >> >>> 2013/6/19 Gerald Coley <[email protected]>: >>>>>>> >>>> >>>>>>>>>>>>>> >>>> >> >> >>> > Are you using the ADC ground as your reference ground? >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > Gerald >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > On Wed, Jun 19, 2013 at 9:34 AM, Weboide >>>>>>>>>>>>>> >>>> >> >> >>> > <[email protected]> >>>>>>> >>>> >>>>>>>>>>>>>> >>>> >> >> >>> > wrote: >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> Using the analog pins on my BBB, i have a light sensor >>>>>>>>>>>>>> >>>> >> >> >>> >> (resistor) >>>>>>>>>>>>>> >>>> >> >> >>> >> and >>>>>>>>>>>>>> >>>> >> >> >>> >> a >>>>>>>>>>>>>> >>>> >> >> >>> >> TMP36 temperature sensor, both plugged as shown on >>>>>>>>>>>>>> >>>> >> >> >>> >> adafruit. >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> Would there any reason (on a BBB) that the following spike >>>>>>>>>>>>>> >>>> >> >> >>> >> to >>>>>>>>>>>>>> >>>> >> >> >>> >> 1.8V >>>>>>>>>>>>>> >>>> >> >> >>> >> appear >>>>>>>>>>>>>> >>>> >> >> >>> >> on both pins (and delayed)? This happened to me twice now. >>>>>>>>>>>>>> >>>> >> >> >>> >> Otherwise >>>>>>>>>>>>>> >>>> >> >> >>> >> they >>>>>>>>>>>>>> >>>> >> >> >>> >> work fine... >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> See the second chart at >>>>>>>>>>>>>> http://beaglebone.codealpha.net/ >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> I would understand that the light sensor could somehow show >>>>>>>>>>>>>> >>>> >> >> >>> >> 1.8V >>>>>>>>>>>>>> >>>> >> >> >>> >> if >>>>>>>>>>>>>> >>>> >> >> >>> >> it >>>>>>>>>>>>>> >>>> >> >> >>> >> is >>>>>>>>>>>>>> >>>> >> >> >>> >> too bright, but the temperature sensor suddenly climbs up >>>>>>>>>>>>>> >>>> >> >> >>> >> as >>>>>>>>>>>>>> >>>> >> >> >>> >> well >>>>>>>>>>>>>> >>>> >> >> >>> >> and >>>>>>>>>>>>>> >>>> >> >> >>> >> shows >>>>>>>>>>>>>> >>>> >> >> >>> >> 130 degrees Celsius! Is there any interference between the >>>>>>>>>>>>>> >>>> >> >> >>> >> ADC >>>>>>>>>>>>>> >>>> >> >> >>> >> pins >>>>>>>>>>>>>> >>>> >> >> >>> >> or >>>>>>>>>>>>>> >>>> >> >> >>> >> GND's,etc..., or did I hit a fuse or something? >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> The down spikes at the end are when I blew on the sensors >>>>>>>>>>>>>> >>>> >> >> >>> >> and >>>>>>>>>>>>>> >>>> >> >> >>> >> put >>>>>>>>>>>>>> >>>> >> >> >>> >> my >>>>>>>>>>>>>> >>>> >> >> >>> >> hand >>>>>>>>>>>>>> >>>> >> >> >>> >> over the light sensor. And then it looks like the TMP36 >>>>>>>>>>>>>> >>>> >> >> >>> >> finally >>>>>>>>>>>>>> >>>> >> >> >>> >> went >>>>>>>>>>>>>> >>>> >> >> >>> >> down in >>>>>>>>>>>>>> >>>> >> >> >>> >> temperature. >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> Arnaud >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> -- >>>>>>>>>>>>>> >>>> >> >> >>> >> 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]. >>>>>>> >>>> >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> For more options, visit >>>>>>>>>>>>>> >>>> >> >> >>> >> https://groups.google.com/groups/opt_out. >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> >> >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > -- >>>>>>>>>>>>>> >>>> >> >> >>> > Gerald >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > [email protected] >>>>>>>>>>>>>> >>>> >> >> >>> > [email protected] >>>>>>> >>>> >>>>>>>>>>>>>> >>>> >> >> >>> > http://beagleboard.org/ >>>>>>>>>>>>>> >>>> >> >> >>> > http://circuitco.com/support/ >>>>>>>>>>>>>> >>>> >> >> >>> > >>>>>>>>>>>>>> >>>> >> >> >>> > -- >>>>>>>>>>>>>> >>>> >> >> >>> > For more options, visit >>>>>>>>>>>>>> http://beagleboard.org/discuss >>>>>>>>>>>>>> >>>> >> >> >>> > --- >>>>>>>>>>>>>> >>>> >> >> >>> > You received this message because you are 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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]. >>>>>>> >>>> >>>>>>>>>>>>> >>>> >> >> >> For more options, visit >>>>>>>>>>>>> >>>> >> >> >> https://groups.google.com/groups/opt_out. >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>>> >>>> >> >> >> >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > -- >>>>>>>>>>>> >>>> >> >> > Gerald >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > [email protected] >>>>>>>>>>>> >>>> >> >> > [email protected] >>>>>>> >>>> >>>>>>>>>>>> >>>> >> >> > http://beagleboard.org/ >>>>>>>>>>>> >>>> >> >> > http://circuitco.com/support/ >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > -- >>>>>>>>>>>> >>>> >> >> > For more options, visit http://beagleboard.org/discuss >>>>>>>>>>>> >>>> >> >> > --- >>>>>>>>>>>> >>>> >> >> > You received this message because you are subscribed to a topic >>>>>>>>>>>> >>>> >> >> > in >>>>>>>>>>>> >>>> >> >> > the >>>>>>>>>>>> >>>> >> >> > Google Groups "BeagleBoard" group. >>>>>>>>>>>> >>>> >> >> > To unsubscribe from this topic, visit >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> https://groups.google.com/d/topic/beagleboard/jm2QpEQNYoY/unsubscribe. >>>>>>>>>>>> >>>> >> >> > To unsubscribe from this group and all its topics, >>>>>>>>>>>> send an email >>>>>>>>>>>> >>>> >> >> > to >>>>>>>>>>>> >>>> >> >> > [email protected]. >>>>>>> >>>> >>>>>>>>>>>> >>>> >> >> > For more options, visit >>>>>>>>>>>> >>>> >> >> > https://groups.google.com/groups/opt_out. >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>>> >>>> >> >> > >>>>>>>>>>> >>>> >> >> >>>>>>>>>>> >>>> >> >> -- >>>>>>>>>>> >>>> >> >> 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]. >>>>>>> >>>> >>>>>>>>>>> >>>> >> >> For more options, visit >>>>>>>>>>> https://groups.google.com/groups/opt_out. >>>>>>>>>>> >>>> >> >> >>>>>>>>>>> >>>> >> >> >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > -- >>>>>>>>>> >>>> >> > Gerald >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > [email protected] >>>>>>>>>> >>>> >> > [email protected] >>>>>>> >>>> >>>>>>>>>> >>>> >> > http://beagleboard.org/ >>>>>>>>>> >>>> >> > http://circuitco.com/support/ >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > -- >>>>>>>>>> >>>> >> > For more options, visit http://beagleboard.org/discuss >>>>>>>>>> >>>> >> > --- >>>>>>>>>> >>>> >> > You received this message because you are subscribed to a topic in >>>>>>>>>> >>>> >> > the >>>>>>>>>> >>>> >> > Google Groups "BeagleBoard" group. >>>>>>>>>> >>>> >> > To unsubscribe from this topic, visit >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > >>>>>>>>>> https://groups.google.com/d/topic/beagleboard/jm2QpEQNYoY/unsubscribe. >>>>>>>>>> >>>> >> > To unsubscribe from this group and all its topics, send an email to >>>>>>>>>> >>>> >> > [email protected]. >>>>>>> >>>> >>>>>>>>>> >>>> >> > For more options, visit >>>>>>>>>> https://groups.google.com/groups/opt_out. >>>>>>>>>> >>>> >> > >>>>>>>>>> >>>> >> > >>>>>>>>> >>>> >> >>>>>>>>> >>>> >> -- >>>>>>>>> >>>> >> 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]. >>>>>>> >>>> >>>>>>>>> >>>> >> For more options, visit >>>>>>>>> https://groups.google.com/groups/opt_out. >>>>>>>>> >>>> >> >>>>>>>>> >>>> >> >>>>>>>> >>>> > >>>>>>>> >>>> > >>>>>>>> >>>> > >>>>>>>> >>>> > -- >>>>>>>> >>>> > Gerald >>>>>>>> >>>> > >>>>>>>> >>>> > [email protected] >>>>>>>> >>>> > [email protected] >>>>>>> >>>> >>>>>>>> >>>> > http://beagleboard.org/ >>>>>>>> >>>> > http://circuitco.com/support/ >>>>>>>> >>>> > >>>>>>>> >>>> > -- >>>>>>>> >>>> > For more options, visit http://beagleboard.org/discuss >>>>>>>> >>>> > --- >>>>>>>> >>>> > You received this message because you are subscribed to a topic in the >>>>>>>> >>>> > Google Groups "BeagleBoard" group. >>>>>>>> >>>> > To unsubscribe from this topic, visit >>>>>>>> >>>> > >>>>>>>> https://groups.google.com/d/topic/beagleboard/jm2QpEQNYoY/unsubscribe. >>>>>>>> >>>> > To unsubscribe from this group and all its topics, send an email to >>>>>>>> >>>> > [email protected]. >>>>>>> >>>> >>>>>>>> >>>> > For more options, visit >>>>>>>> https://groups.google.com/groups/opt_out. >>>>>>>> >>>> > >>>>>>>> >>>> > >>>>>>> >>>> >>>>>>> >>>> -- >>>>>>> >>>> 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]. >>>>>>> >>>> >>>>>>> >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>> >>>> >>>>>>> >>>> >>>>>> >>> >>>>>> >>> >>>>>> >>> >>>>>> >>> -- >>>>>> >>> Gerald >>>>>> >>> >>>>>> >>> [email protected] >>>>>> >>> [email protected] >>>>>> >>> http://beagleboard.org/ >>>>>> >>> http://circuitco.com/support/ >>>>> >> >>>>> >> -- >>>>> >> 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] <javascript:> . >>>>> >> >>>>> >> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >> >>>>> >> >>>> > >>>> > >>>> > >>>> > >>>> > -- >>>> > Gerald >>>> > >>>> > [email protected] <javascript:> >>>> > [email protected] <javascript:> >>>> > http://beagleboard.org/ >>>> > http://circuitco.com/support/ >>>> > >>>> > -- >>>> > For more options, visit http://beagleboard.org/discuss >>>> > --- >>>> > You received this message because you are subscribed to a topic in the >>>> > Google Groups "BeagleBoard" group. >>>> > To unsubscribe from this topic, visit >>>> > https://groups.google.com/d/topic/beagleboard/jm2QpEQNYoY/unsubscribe. >>>> > To unsubscribe from this group and all its topics, send an email to >>>> > [email protected] <javascript:> . >>>> > For more options, visit https://groups.google.com/groups/opt_out. >>>> > >>>> > >>> >>> -- >>> 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] <javascript:> . >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >> >> >> >> -- >> Gerald >> >> [email protected] <javascript:> >> [email protected] <javascript:> >> http://beagleboard.org/ <http://beagleboard.org/> >> http://circuitco.com/support/ <http://circuitco.com/support/> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because 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