What I am trying to do: I am placing my accelerometer [parallax BS2] ontop of my amigobot. I move the amigobot 1 meter foward with the acceleromter ontop while taking data for x and y direction. I then read the data to my computer and plot it. Data: The plot shows the data jumping up and down as time increasing and then it begins to decrease until it hits 0 again. What I know : Acceleration in this case should be like a trapezoid going up based on the increase in velocity and then reaching a constsant velocity(accell is 0) and then coming back down to 0 when the amigobot reaches 1 Meter. It would be pretty difficult to integrate the area underneath this because it looks like there is alot of noise invlove and that could be affecting it. Issue: I am not sure why my data is jumping up and down. I never used an accelerometer before so this is proving the text book stuff right but I am not in this situation I am having. Thank you if anyone can help.