I’m not sure about you, but I’ve always loved the idea of tangible computer interfaces. I’ve built some plain paper and cardboard box multitouch displays, and some advanced IR projections ones. I found that both were lacking in giving you a nice clear display to work with, so this Saturday I set out to make a multitouch system out of an LCD.
The parts required are simple. You’ll need an LCD that you can tear apart, a box, light source (60 watt bulb in my case), a camera, some film negatives, plexan/glass, and all the necessary cables.
Tools are scissors, duct tape, hot glue, and TouchLib.
The instructions are similar to building a display with just plexan, but we’ll take it a step further. I began by disassembling my LCD and removing the backlight and any non translucent material. This varies from display to display so I’ll spare you the details.
I then sandwiched it between two sheets of plexan to give it some strength. It’s being held together with hot glue.
Build a box that can hold your display, camera, and light. You’ll need to modify the camera to make it only sensitive to IR.
Finally, you should make an IR pen.
Install TouchLib by running the Config.bat, adjust the sliders to only read the correct ‘blobs’ or IR light. Hit enter to run calibration, finally end with ESC to save. Then you can run any Clients or TouchLib applications.