I got a sonic range sensor with my starter kit, been testing pieces all day, but when i got to this one i ran into a problem.
Running a tutorial code (actually tried 5 different once) i always get the same result.
The range is always between 3200-3300 no matter what.
last code i tried was: http://tolsonwinters.com/a/HC_SR04_Range_Finder.ino
(cant show wiring, but im very sure its as it should be. trig to 12, echo to 13.
ground and 5 v. following the labels on the sensor.