I mew, you mew we all mew for IMU! The MPU-6050 is what we call "an oldie but goodie" - this popular triple-axis accelerometer plus gyro combo has been a staple of electronic projects for years, and we've finally gotten around to making a breakout for it! Inside are two sensors, one is a classic 3-axis accelerometer, which can tell you which direction is down towards the Earth (by measuring gravity). The other is a gyroscope that can sense how fast the board is being twisted around. By combining this data you can tell how your project is moving through space.