https://partofthething.com/thoughts/making-a-cheap-and-simple-barn-door-star-tracker-with-software-tangent-correction-for-astrophotography/
I like to mix hobbies, so naturally I've been eying astrophotography for a while. I've taken a time-lapse here and a moon picture there but, inspired...
making abarn doorstar trackercheapsimple