BR,

Thanks for the info.  I'll take a look at libpruio.

At 11:43 AM 10/30/2015, TJF wrote:
Hi John!

As Przemek mentioned, a simple voltage divider can scale the input voltage. Additionaly I use a LED (orange color) between the ADC input and ground in order to block overvoltage. (The LED starts to light up at 1V5 and consumes full power at 1V8. 1 / 6 of the ADC resolution get lost (is less accurate), but the burning LED as indicatior is a nice side effect.)

Regarding software you should have a look at <http://hackaday.com/2015/02/16/library-upgrade-to-pru-gives-fast-io-on-beaglebone/#comments>libpruio.

BR


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