[auditt241]

Well an accelerometer detects a tilt of the bot. They can determine if you robot has been moved and can reset it to its original spot. For example, if your bot was driving and you got hit the accelerometer would autmatically determine it moved and it would reset it to your original location. With an accelerometer it must be exactly level or else it won't work right. You need a plot chart with a G force speed and it senses the acceleration and with this info (in theory) it can determinme how much a robot has moved, and correct it self to its original position. A Gryo senses lateral motion and can detect wihcih angle in reference to your original position. Its pretty much a gryoscope in a big box. And im sorry I dont know what a limit switch is.