Comparator working... also, ultrasound (Parallax Ping) sensor is working
completely (testing with scale factor, and readings appear correct,
tested 0.15 - 2.0 feet with no issues so far... need to test on the
field to be certain. Also, tentative goal to implement 4x comparators
for encoder channel filtering, ETA: 03/24/13 afternoon/evening...?) -AG