# How do I get gyro sensor data (L3G4200D) into degrees/sec?

I've been using a gyroscope sensor for an Arduino project. It's all hooked up and working but I have no idea what the units of the data it's giving me are in. I try to spin the board in my hand at what should be roughly 90 deg/sec but I'm getting numbers from the gyro of 2000-5000 range. I've just tried scaling it down and calibrating the scale factor by visually rotating the board 90 deg/sec. I know there has to be a better way to do this. I've been over the data sheet many times and I'm still not getting it. It says the units are mdps/digit which I've never heard of before.

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Did you have a look at the product page? If not take a look at section 5.2 of this and section 3.2 of this document. Maybe you are interpreting the raw data in a wrong way. – PetPaulsen Aug 29 '12 at 7:51
Thanks! I hadn't seen the app notes before. I found what I needed in there. And it had a good section about how to filter the noise from the sensor. – JDD Aug 29 '12 at 10:45