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As Dave said above we did some rather extensive research into direction finding and compass usage. Besides the fact that they are somewhat expensive, they cannot distinguish the earth's magnetic field when placed within the robot frame with all the DC(magnetic) motors and various metals in the construction. There is also so many variables when used inside buildings due to electric fields and metals in the roof, walls and floors. Although they look very good on the surface they became to difficult to implement.
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How bad was the interfernce with the compass?? Which compasses did you try using?? Would having a totally plastic robot fix the problem??? Im asking these questions because Im building robots for fun and it is cheaper for me to use plastics. Ill see what I can find out about them.
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If either a public officer or any one else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were no time to warn him of his danger, they might seize him and turn him back without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river. -Mill
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