mattallen37 wrote:Well, it's a magnetometer, so any magnetic field will effect it's readings. That means that motors, batteries, wires, other sensors, and any magnetic metal (iron/steel primarily) could have an effect on the accuracy of the returned heading.
For an NXT robot, it's recommended to keep the compass at least 6 inches away from anything electrical. Often the easiest way to do this is by mounting it above the rest of the robot.
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