GY-9150 MPU-9150 Nine-Axis Motion Tracking Module

Full orientation tracking needs three separate measurements working together - rotation rate (gyroscope), linear acceleration and tilt (accelerometer), and absolute heading (magnetometer/compass) - and the MPU-9150 integrates all three onto one chip rather than requiring three separate breakout boards wired independently. That integration is what makes genuine 9-degrees-of-freedom sensor fusion practical on a hobbyist budget and a single I2C bus.

Each of the three sensor types gets its own 16-bit ADC and independently selectable range (gyro up to ±2000°/s, accelerometer up to ±16g, magnetometer up to ±1200µT), so a project can tune sensitivity per axis type rather than being locked into one fixed range across all measurements. An internal low-dropout regulator means it runs cleanly across a 3-5V supply without needing external regulation.

Common uses are drone and robot orientation/attitude estimation combining all three sensor types for accurate heading and tilt, motion-capture and gesture-recognition projects, and any build needing genuine compass-corrected orientation rather than gyroscope-only tracking that drifts over time.