Just starting out on the Arduino Uno v3. After playing around with a 10k pot wired from 5V to Gnd, with the wiper attached to A0, some of the results are a bit puzzling to me. I'm wondering just what the input impedance of the ADC portion of the Arduino presents to the outside world. I'm seeing much more effect on the variable voltage divider created by the pot than I would have expected.
Also I'm starting to think that the A0-5 pins might just be one ADC being multiplexed. I would get very jiggly readings on analogReads until I introduced a delay of 100 miliseconds in the loop. I guess I was expecting much more from this inexpensive chip than it was prepared to provide. LOL
Thanks; Walt E. North Carolina