The ADCs are designed for resistive touchscreen interfacing. 1.8V consumes less power than higher voltage and 1.8V was good enough for touchscreens.This isi a limitation of the processor, not the design of the board. The board was designed to meet the capability of the processor.
Gerald . On Wed, Nov 6, 2013 at 3:11 PM, skypuppy <[email protected]> wrote: > Why in the world would anyone set analog in voltages as 1.8V??? > Everything I have and know about uses 0-5V. > I freely admit I am a complete newbie at the BeagleBone Black (BBB), but > come ON. > I have an unverified theory that circuitry in the processor chip is unable > to handle 5V in, but couldn't they have used a wider trace or something? > I purchased 2 BBB's to use on for monitoring engine temps (4), 3D > positioning, G-forces experienced, and airspeeds. All my A/D chips output > 0-5V while only a couple support I2C. I was all excited about the BBB > until I actually spent nearly $300 only to find out it's major limitation. > I assumed EVERYONE in the embedded world worked on 5V analog in, like > Arduino and Raspberry Pi. > Does the Arduino have I2C? > Lots of reading seems to indicate, also, that not many versions of Linux > or Android for BBB support graphics acceleration in hardware that is > available in the BBB. <sigh> > > -- > 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. > -- 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.
