"Before I may dive in a too complicated topic. Instead looking at the data sheet analog out is Vcc/512 per inch for a supply of 5V yield 9.8mV/inch at 3.3V 6.4mV/inch (very low for a noisly enviroment); also Maxbotix average (and peak) current draw…"
"Hi Doug,
I think you have yourself already solved the problem: it's speed sensor too much. I dont know landing SkyFun speed but sonar operate a 42 Khz with a sampling rate max 10hz(100ms): IMHO now just imagine sensor stopped and "land moving"…"