Gyro Breakout Board

A gyroscope is a type of sensor that can sense twisting and turning motions. Often paired with an accelerometer, you can use these to do 3D motion capture and inertial measurement (that is - you can tell how an object is moving!) As these sensors become more popular and easier to manufacture, the prices for them have dropped to the point where you can easily afford a triple-axis gyro! Only a decade ago, this space-tech sensor would have been hundreds of dollars.

This breakout board is based around the latest gyro technology, the L3GD20H from STMicro. It's the upgrade to the L3G4200 (see this app note on what to look for if upgrading an existing design to the L3GD20) with three full axes of sensing. The chip can be set to ±250, ±500, or ±2000 degree-per-second scale for a large range of sensitivity. There's also built in high and low pass sensing to make data processing easier. The chip supports both I2C and SPI so you can interface with any microcontroller easily.

Since this chip is a 3.3 V max device, but many people want to use it with an Arduino, it is soldered it to a breakout board with level shifting circuitry so you can use the I2C or SPI interface safely using a 5 V interface device. There is also a 3.3 V regulator on there so you can power it from 5 V.

The PCB comes with four 2.1 mm mounting holes for firmly attaching it to your project. Use #2-56 imperial or M2 screws screws.

Getting started is easy - simply connect SDA to your Arduino I2C data pin (On the UNO this is A4), SCL to I2C clock (Uno: A5), GND to ground, and Vin to 3 or 5VDC. Then install and run the easy to use Arduino library, which will print out the XYZ sensor data to the serial terminal. The library also supports SPI on any 4 digital I/O pins, see the example for wiring.

Technical Details:

• RoHS Compliant
• Dimensions (without header): 30.65 mm × 19.11 mm × 3 mm
• Weight: 2.02 g
• This board/chip uses I2C 7-bit address 0x6B.