Overhead projectors use a bright lamp and mirrors to display text or images from a transparency sheet on a wall or screen. If your projector displays a shadow when projecting, you must troubleshoot ...

Projectors can be a cheaper and far more convenient way to put a gigantic 100+ inch TV in your living room. But to get an image that rivals an LCD or OLED TV, you can’t just point them at a bare wall.

Apparently, there’s some sort of sporting event being televised this weekend that has been historically used as an excuse to buy a big-screen TV. [Joel] wanted a huge-screen TV on the cheap, so he ...

Technically, only one type of projection equipment – transmissive – qualifies as overhead projection, but the lines between competing analog presentation methods blur when less-experienced presenters ...