We've had a short break since the summer finished and everyone went back to school/ college. Thank goodness for half term though!. This mid-term holiday gave us the chance to get on and finally make the multi-touch screen!
To be honest we did need a short break while the equipment was ordered. Some of it came from the States so there was a fair way for it to travel. The basic kit list included:
1 strip of infra red LED ribbon (with power pack and UK compliant cabling)
1 70 x 55cm sheet of laser cut perspex (8mm thick)
1 sheet of tracing paper covered in 3 thin layers of silicone
1 Playstation 3 camera with infra red blocking filter removed
1 short throw projector
1 mac mini
1 box to house it all
As mentioned before we were using the FTIR touch screen technique which involves shining infra red LEDs through a perspex sheet. When someone touches the perspex, this interrupts the LED light flow, which is picked up by the camera and relayed to the Mac mini which then processes everything and turns the table into a multi-touch surface. We used an open source software programme called Community Core Vision, which we downloaded from the online NUI Group Community here. All research and information for this project was picked up online. Amazing what you learn on the internet isn't it? :)
As they say, a picture does tell a thousand words so have a look above and check back with us next week for a video documenting the making of the table.
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