The APC (Atari Punk Console) is some kind of noise toy. Its circuit was originally described in the early 80s but it was such a hit that it's become something of a go-to project for folks new to electronics and soldering! There are tons of versions of it but they all share the same basic parts.
The Oskitone APC is the function of the classic circuit in an Oskitone form. It's not very useful or musically pleasant, but it's fun!
These are the 3D-print files for the APC DIY Electronics Kit. Recommended for folks with some experience soldering through-hole electronics. The kit has 14 components and can be put together in about half an hour.
For detailed soldering instructions, up-to-date slicing recommendations, source code, and full license, see: https://github.com/oskitone/apc
The author hasn't provided the model origin yet.