First, what's a 12 turn pot? The directions tell me "rotate the zero adjust pot fully counter-clockwise (12 turn pot)"
Second, based on the calibrating instructions from http://www.mrrobot.com/usonic.html
I can't figure out why my sensor is reading eratic measurements despite its distance from any object.
Am I reading the directions correctly in that I only need Pin1 for VDD, Pin2 for VCC, and Pin6 for the analog output to my ADC?