In 2002 the Graffiti Research Lab put together the rather excellent L.A.S.E.R. Tag system which allows you to draw virtual graffiti with nothing more than a camera, a projector and a laser pointer. They've done really awesome things with this showing it off around the world, virtually defacing buildings everywhere.

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In the planning stages of the HackADay Gathering meetup we decided we needed something for all the hackers to play with and someone floated the idea of setting up the laser tag system in the space. This didn't seem like enough of a hack to me so I decided we should build a control system for it to make it easier to use.

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Unfortunately we couldn't get a working copy of the Laser Tag source so we have had to improvise. Most options in the system are available through a cursor navigated menu system, so we thought we could quickly use an Arduino to simulate a USB keyboard and send the appropriate keypresses. So we're going to put together a control box with a couple of buttons and switches to control the main features of the software, Brush Color, Brush Size and Brush Shape.