Multi Touch Table

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Multi Touch Surface Table Interface
Multitouch Table
Next meeting: Thursday, 1-3pm
Project lead: Ryan Reggio
Skills needed: C++/Java/Processing coding, construction, passion and dedication
Parent projects: none
Child projects: DIY Projector


Participants/Interested Parties

Ryan Reggio

Danny Dunn

Budi Mulyo

Alan Widmer

Rehana Rodrigues

Nick Olson

Wim Lewis

Patrick Roush

Amit Sett

Jonny Fosnight

Alan Geleynse

Kyle Milliken

Jared Bauer

Megan C. Perry

Jennie Bot


Design Requirements

For the design, here's the requirements that we're looking for:

  • it needed to be about 4' high and 5' across;
  • it needed to be easily disasembled for transport;
  • it had to be quick to assemble for use;
  • it had to work well in a lighted room;
  • and of course, it had to be cheap.

Parts List

  • Table (Surface to mount on)
  • Glass 3' 5 1/8" x 1' 4"
    • edges as static image (picked up by IR but not projected)
  • IR LEDs - Ordered 150 count of these

Resources to Acquire

  • Surface to project onto:
    • Vellum (also called drafting paper)
  • projector (mirrored from distance, or mounted) (buy)
  • webcam (buy)
  • power supply (6-8 amp) (buy or scrounge)
  • framing (build)
  • dedicated computer

Potential Finds

  • Dedicated computer with firewire
  • Webcam with firewire
  • Projector with appropriate throw
    • mirror math
    • the bottom of the glass will be 3' from the ground(approx., give or take 2")


  • As of April 21 all of the LED wiring is complete. Now building projector.
  • We had soldering party during SCoW event on April 13, 2011.
  • Using Acrylic, Nick were able to build channels for IR LEDs.
  • The table surface is now somewhat stable, and more or less done, with just a little tweaking it will be usable.
  • Complete testing the tracking software: TUIO (reacTIVision open source software) with normal webcam and flashlight.
  • Re-purposing IR LEDs from remote controls. We ended up buying new IR LEDs.

July 7, 2011

  • Danny introduced us to petticoat material that was used as a projector screen, and it works really great for playing Motion Bubbles (webcam/flash game).
    • What we like about the material:
      • very light and cheap.
      • Almost Transparent (This property is cool because we could make a holographic image in the middle of the hall way,)
    • What we don't like about this material:
      • Too transparent (The projection didn't stop at the petticoat material, but also to the wall behind it.)

Next Steps

  • Pressing LEDs agains the glass with some kind of foam materials
  • Covering the bottom with plywood+veneer
  • Frosting glass
    • Frosting spray
    • or Using Vellum
  • Fit Projector

Using Petticoat Material as the Screen

  • We plan on finding a way to diffuse the undesired effect by placing the screen on the hall way or placing non reflective materials such as velvet on the wall.
  • Using edge lightning technique or a webcam, we might be able to turn this into a multitouch or multigestures interface




DIY Multitouch Surface Computer


See Also

Other ways to participate

It takes $137 a day to run Jigsaw Renaissance

More Info


We're located at:
Jigsaw no longer has a physical space
815 Seattle Blvd S. STE 112, Seattle WA 98134

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In International District inside old INS building called Inscape
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