The SparkFun 9DoF Razor IMU M0 combines a SAMD21 microprocessor with an MPU-9250 9DoF (9 Degrees of Freedom) sensor to create a tiny, reprogrammable, multipurpose IMU (Inertial Measurement Unit). It can be programmed to monitor and log motion, transmit Euler angles over a serial port or even act as a step-counting pedometer.
The onboard LSM9DS1 is equipped with a digital interface, but even that is flexible. The biggest difference between the two boards, besides the slimmed down 0.9"x0.4" footprint, is the number of broken-out pins, with the Sensor Stick featuring only four for quick setup and ease of use.
To achieve its smaller size, the MPU-9250 Breakout features PTH pins that have been wrapped around the border of the PCB in three rows of three or four. The top row (J1) is all one needs to get the most functionality out of the IMU. These include the I