Sometimes the simplest of projects end up revealing the most interesting of things, as for example is the case with [Ryo Mukai]’s light pen for the Vectrex console. It’s an extremely simple ...

Using a device called Graphic 1, they can draw and manipulate circuit designs directly on a cathode ray tube with an electronic light pen, allowing for rapid prototyping and testing of ideas.

Malcolm Lyall-Watson reports for Tomorrow's World on the computer interface of the future - a light pen that can draw directly onto a phosphorescent computer screen. The device, developed by ...