In [Bill]’s latest video, he tears down a 1979 Bell & Howell 16mm projector to probe its inner workings. Movies operate on the persistence of vision (POV) principle, which basically states ...

For those of a certain vintage, no better day at school could be had than the days when the teacher decided to take it easy and put on a film. The familiar green-blue Bell+Howell 16mm projector in ...