Is there a similar system but much more affordable? I don't need it to be space-ready or milspec-grade or even compact, I was just thinking of something for tin

Is there a similar system but much more affordable? I don't need it to be space-ready or milspec-grade or even compact, I was just thinking of something for tinkerers. (The translation used by Sodern, "Star Tracker", gets me only camera gimbals to take astrophotography pictures) Edit: found some leads around the cubesat community. Still to see if it works from the ground or in daytime. https://ieeexplore.ieee.org/document/9179736 https://ieeexplore.ieee.org/document/9179736 https://openstartracker.org/ https://openstartracker.org/