Mini-Multitouch Interface

Step 1 Parts and preparation

Step one: get your parts! Below, you will find recommendations on where to purchase items from the materials list.

Tools:
hacksaw
knife
cordless drill and drill bits
soldering iron
T-Square

Materials:
Webcam (Phillips SP900 Recommended) - Available for purchase on the web
Windows PC (sorry Atari, the vvvv toolkit is Windows-only.)
4.3 x 4.3 mm Infrared (aka nightvision) lens - Available for purchase on the web

Infrared LED's (SFH485 recommended) - available from digikey.
A power supply (output 3.3v DC at 220mA recommended) - Available at most hobby/craft shops
Fast setting crazy glew (any brand, and get it in a brush on bottle) - Available at most hobby/craft shops

Sandpaper, 400 grit and 800 grit - Available at hardware store
Brass Polish - Available at hardware store
8 x 10 sheet of Lexan standard thickness (0.85) - Available at hardware store
8ft strip of "Tile Divider" - Available at hardware store
A cardboard box, at least 1.5 feet tall on one side (we used 1.5' x 1' x 1') - Available at hardware store (or just laying around!)
Small bits of wire. If you don't have wire laying around, get a small spool of 20 or 22 gauge wire, in both red and black.- Available at most electronics/hobby shops

Comments

[sunnyy]

sir plzz tell me that how this interface works with the software. . what software i have to install and how it install. . this is also my final year project.and im started on working on it. plzzz tell me the complete detail and description. . . i shall be so grateful to you

[TheIronHobo]

did you make the one in the video?

[efko]

very nice! i've got a questions... 1) how about latency/responsiveness of such a thing... can it be used for real-time live music, for entering beats, controlling effects etc.? i'm considering building it, but maybe it want perform enough for what i would use it... 2) are there some requirements for lighting? that is can it be usable under any lighting condition? what about some club interiors, sometimes they love to use these UV lamps, do you think it can affect this somehow?

[FarMcKon]

There is low latency on this, it's only limited by how fast your PC can process the video. IT should do OK under black (uv) lights, but it does not do so well in light that has a lot of Infra-red (ie, bright dayligt, outdoors). I hope that helps

[efko]

Thanks! Though don't know what "low" exactly means:-) It's clear, that the processing machine probably won't do much more useful stuff then multitouch handling... But that could be OK. Anyway thanks for nice guide!

[Neodudeman]

lol. icanhascheezburger?

[francoisp]

Cool project ! Could you suggest online stores where to buy 4.3 mm lens without IR filter ? I hope they ship to Canada !

[FarMcKon]

I got mine off ebay. There is a good instructable on making an IR lens and due to visible light leakage with the IR lens, I'm building one of those. I'll post how well that works out.