Cheap Interactive Control

While researching ways to control the table projection, one option was found which used an IR pen to control mouse the functions.
Software written by Johnny Chung Lee allows the use of a Wii remote as an IR camera.

For this software to function all that was needed is a IR pen. I made this for an old biro, IR LED, Push button switch, AAA batteries and gaffer tape

The Wii remote was paired with the Mac and point at the centre of the screen offset by 45 degrees.

Control is limited, but on the whole works surprisingly well. Small demo videos below.