IMU & motion
DoF counts hide the real decision: raw accel/gyro data you fuse yourself versus chips like the BNO055 that output absolute orientation, and whether you need a magnetometer at all.
Analog accelerometers, 6-DoF accel/gyro chips, 9-DoF combos, on-chip-fusion IMUs and standalone magnetometers — about 90 listings from the ADXL335 to the ICM-20948.
- ADXL335 is purely analog, with three voltage outputs on a 5V-ready breakout; ADXL343/ADXL345 are the same accelerometer family with digital I2C/SPI and ±2g to ±16g ranges.
- 6-DoF accel+gyro means MPU-6050 (in Fermion and STEMMA QT versions) or LSM6DSOX/LSM6DSO32; 9-DoF adds a magnetometer via LSM9DS1, ICM-20948 or LSM6DS33+LIS3MDL pairings.
- BNO055 and the CMPS12 tilt-compensated compass do sensor fusion on-chip and hand you headings or quaternions directly; raw 9-DoF parts need Madgwick or Kalman filtering on your MCU instead.
- Magnetometer-only parts live here too: LIS3MDL, QMC5883P and the TMAG5273 3D Hall-effect sensor cover compass headings and magnet-position sensing without any inertial data.
