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This guide will walk you through creating your very own FTIR Multi-touch table.

It has been written for people without an engineering background, and we would love you to document your project as you progress.

Documenting your projectEdit

Firstly, if you havn't done so already; create an account. If you are already a user of another Wikia you may want to use the same login details.
When you login, go to your user page and add a section that looks a bit like this:

==Projects==
These are the projects I am working upon:
* [[User:YOURNAME/PROJECTNAME|PROJECTNAME]] - This is my first Multitouch.

Now go to the Community Projects page, and add an entry into the project table like this:

|-
| [[User:YOURNAME/PROJECTNAME|PROJECTNAME]] || [[User:YOURNAME]] || Under development

Next you need to create the actual project page, so simply click on one of the links you have created, and start to document what you buy, where you buy it from, and what you do with it.

Components RequiredEdit

  • 8mm Clear Acrylic/Plexiglass This will form the surface of your device. You need to buy a sheet that is the correct size for your requirements.
  • 5mm Infrared LED's This will form the internal lighting component of the surface.
  • 12v AC power supply
  • Resistors - Please see text for resistance.
  • Infrared Camera - This can be a custom purchase, or a converted webcam.
  • Projector
  • Tracing paper
  • Solder

Tools RequiredEdit

  • Screwdrivers.
  • Drill or Dremel
  • 5mm Drill bit designed for drilling plastics
  • Soldering Iron

ConstructionEdit

The SurfaceEdit

The first thing you need to do is drill 5mm holes down one edge of your acrylic sheet to allow the insertion of your LED's.

Safety first Make sure your sheet is secured or held firmly and that you are wearing suitable safety equipment.

Drill bits that are designed for plastic should be used where possible. Those manufactured for metal will chip your sheet, but could be used if the tips are blunted slightly through grinding. Wood bits should be used with caution and on a slower RPM than a dedicated plastic bit.

If your drill has an adjustable speed setting you should set this to between 500 RPM and 1800 RPM to avoid damaging the plastic.

Common problems:

  • Chipping: Check that you are using the correct bit, and that your sheet is securely fastened. Check that the bit is straight and not wobbling.
  • Cracking: Check that you are using the correct bit, and that your sheet is securely fastened. Reduce your RPM.
  • Melting: Check and reduce your RPM, use a coolant to reduce the temperature (Water is best for plastic). Make sure you are not applying too much pressure.

Circuit for the LED'sEdit

Details to follow

Inserting the LED'sEdit

Details to follow

Converting the WebcamEdit

Please refer to the Webcam Modification guide.

=SoftwareEdit

Details to follow

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