This simple STM setup utilises a piezoelectric actuator constructed by deliberately cutting a piezo speaker into four quadrants. With individual drive wires attached to the four quadrants.

This project is built using PlatformIO. The code is structured to separate hardware interactions from the core logic, making it testable without actual Arduino hardware.

CACKLE - Card Adaptable Controller Kinetic Link Electronics. This is designed to be a super small, open source, adaptable control board. Each module is 15mm sqaured, has one of 4 dedicated functions, ...