A data projector can cost between twice and 10 times as much as an overhead projector, as of July 2013. Lamp prices likewise exceed those of analog projection equipment, coming in at $300 for a ...

Making an Overhead Projector Wireless. When you're using a projector to display presentations, videos or other media, you're typically limited to keeping the projector in one static location so ...

In The Overhead Projector: Don’t Overlook It (Part 1), I explained why it’s better to use a projector (be it an old-fashioned overhead or LCD) than to write on the board. Now we turn to how to ...

A lot has been said and written about the earmark Barack Obama sought for a new $3 million overhead projector at the Adler Planetarium since John McCain raised it in Tuesday night’s debate. And ...

1960s: The Overhead Projector. Photo: North Carolina State University. A Brief History: Roger Appeldorn created a machine that projected the image of writing on clear film in the early 1960s, while ...

"Any projector with Airplay can screen match your tablet," he notes in a follow-up tweet. "I have an open ceiling so mounting was easy. Then any drawing program (I use Procreate).