Gyroscope Orentation Decay

[D.Viddy]

I would reccomend using an electronic compass from Digi_Key, I know they have them (though they may not be cheap).

I have checked these compasses out, they are too expensive to fit the < 100 rule. They are in excess of $600.

Also, a note on the system you are trying to build: They are very mechanically complex and use many motors.

I have designed this system in such a way that it only uses the two drill motors for driving, but still giving us 4 wheel drive. The system allows for Stafing as well as 0 degree turning. I think it will be worth it.

I use something exactly like you are thinking in my RC Helicopter, called a heading hold gyro which is a combination gyro and electronic compass that keeps the tail rotor locked into to a direction unless you change it. Most Gyros (for RC) have a gain that if too low won't help you, too high and causes an oscillation so the heading hold helps out pretty nicely.

So then are you saying that this would be a good thing for us to use. Where can I find this part?