Adafruit Wide-Range Triple-axis Magnetometer - MLX90393 STEMMA QT SF_AVR The included traveling nut has

The included traveling nut has four mounting holes and moves 40 µm (1

4GHz ultra low-power wireless communication – it even features on-chip NFC tag support

excellent conductive materials and nanometer pressure sensitive layers

Even if you don't plan on using encoders on your first robot

Adafruit Wide-Range Triple-axis Magnetometer - MLX90393 STEMMA QT SF_AVR The included traveling nut hasMeasure the invisible magnetic fields that surround us, with this wide range magnetometer. The MLX90393 is a wide range magnetic field sensor, that can measure 16 bits in ranges from 5mT up to 50mT in all 3 axes. Compared to most magnetometers, this gives a huge range, which makes it excellent for detecting magnets and magnetic orientation, rather than the Earth's magnetic field. (Magnets have a much stronger field that overwhelms most magnetometers