picoTracker is a DIY music tracker that can be built with off the shelf components and built by soldering all the components together using wires, this is laborious, prone to errors and limits some of the design choices. I set myself to create a PCB for the project that could be easily built to make things easier. This set me off in a different direction and ended up creating a portable version of the picoTracker.
I ported LittleGPTracker to the Raspberry Pi Pico microcontroller and created an enclosure for 3D printing. The port has some limitations, some modifications and room to grow. Total cost of the picoTracker is $25 - $50 (USD) depending on things you may already have and where you source the components.