A GMR magnetometer sensor is connected to an Arduino Trinket
Amplification, offset correction, and temperature-compensation of an NVE GMR sensor using an ATtiny85 Trinket board. Sensor OUT- to PB3/A3; OUT+ to PB4/A2; PWM output on PB0; digital threshold output to red LED (PB1).
Trinkets are small and inexpesnive, and the ATtiny processors are ideal for this type of sensor because they have internal preamps.
A live video, including a wiring diagram and schematic, is available at: https://www.nve.com/Videos/video-page.php?video=AAL004-Trinket&title=GMR%20Sensor%20to%20ATtiny%20Interface