Arduino Compass Display - or "Why I relearned 8th grade trigonometry" : r/ arduino
DAOKI 3V-5V GY-273 QMC5883L Triple Axis Compass Magnetometer Sensor Module Three Axis Magnetic Field Module Materiale,for Arduino Three Axis Magnetic Field Module: Amazon.com: Industrial & Scientific
Use an ATtiny85 to Build Your Own Electronic Compass - Electronics-Lab.com
Interfacing HMC5883L / QMC5883 Digital compass with Arduino – SURTR TECHNOLOGY