While not yet common on most keyboards, keyboards with knobs are becoming increasingly popular due to the added functionality and customization options that the keyboards offer. Two of the more common implementations of knob designs include mechanical and rotary encoders. However, mechanical knobs are bulky and wear out after long-term use and contact based rotary encoders are disturbed by environmental factors such as dust and water. To help combat these issues, a 3D Hall-effect sensor can be used. 3D Hall-effect sensors are able to monitor the magnetic field from all three axis which can then be used to calculate angle and magnitude. Devices like the TMAG3001 have an integrated angle calculation engine (CORDIC) which can be used to provide angle positioning for a full 360 degrees of rotation. Additionally, the TMAG3001 also provides a magnitude calculation which can also be used to determine whether a button press has occurred.