I built an automatic cat door. I started with a standard cat door, it has a flap and my cat can go in and out as she pleases. But it also has a plastic slide which can be inserted to prevent the cat ...
The rabbit hole of features and clever hacks in [chiprobot]’s NEMA17 3D Printed Linear Actuator is pretty deep. Not only can it lift 2kg+ of mass easily, it is mostly 3D printed, and uses commonplace ...