MicroView Digital Compass
Contributors:
AGlass0fMilk
AGlass0fMilk 
Resources and Going Further
There are a many more cool projects you can make with the MAG3110 sensor. If you combine the MAG3110 with a few other sensors, you can make a variety of projects that involve location and orientation sensing.
Check out Shawn Hymel's Adventues in Science: Using a Magnetometer as a Compass and example code for ideas:
For more sensor fun, check out these other great SparkFun tutorials:
Hackers in Residence - Hacking MindWave Mobile
Review, teardown, and hacking tutorial for the MindWave Mobile, a $99 commercial grade EEG sensor.
Accelerometer Basics
A quick introduction to accelerometers, how they work, and why they're used.
Qwiic Digital Indoor Thermometer
Qwiic-ly build a digital indoor thermometer to measure the ambient temperature of the room and display it using an OLED on an I2C bus!
Air Quality Sensor - SGP40 (Qwiic) Hookup Guide
Get started measuring indoor air quality with the SparkFun Air Quality Sensor - SGP40 (Qwiic) Hookup Guide.