gyrocompass

tom sparks

I am looking for a gyrocompass (en.wikipedia.org/wiki/Gyrocompass) that can be used with the Propeller chip and
I can read the angles of the movement from gyrocompass

LoopyByteloose

A gyrocompass is essentially a gyro that is set to a reference direction [noparse][[/noparse]ideally true north] at power up. On ships, they would usually set the reference very infrequenty when they had an excellent reference, then leave the gyrocompass running for months.· With a small robot, that isn't likely to happen.

www.sparkfun.com has the gyros. Parallax has a Hitachi compass module.

Be forewarned that compasses can be confused by ferrous metal nearby, both iron and nickel. That includes zippers on your coat, the watch on your wrist,·a wrench in your pocket, steel table and chair legs, and the casing of batteries. So, if you are going to get useful information from it, you have to both be aware of the enviroment that you use it in and how you mount it on your robot.

Actually, I think your idea is brilliant. Just have the electronic compass provide direction at startup, let the gyro become stable, and then you get a stream of useful and repeatible data for mapping and later nagivation.

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"Everything in the world is purchased by labour; and our passions are the only causes of labor." -- David·Hume (1711-76)········

···················· Tropically,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan

Post Edited (Kramer) : 9/23/2007 11:00:37 AM GMT

tom sparks

all electronic compass fail when they are tilted more that 14 degrees in any direction
I am not using it for nagivation or mapping, im using it to find the angle and direction a surface is pointing eg my head