Archive for soft

Cutout Circuit Board

Posted in Technology, V2_ with tags , , , on June 7, 2009 by Simon

Just a repost of my previously posted fabmoment.

Latest touchpad version

For a project at the V2_lab we had to develop a transparent touchpad in textile. For this we needed to create circuit boards that are thin, small, easy to mount on a textile substrate and more or less flexible. To create such a circuit board we started to experiment with cutting copper foil on the CAMM-1 at Protospace fablab.

Latest touchpad version
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Wearable Sound Experiment

Posted in Arts, Technology, V2_ with tags , , , , , on May 21, 2009 by Simon

The 16th and 17th of May V2_ Institute for the Unstable Media held a 2-day workshop on wearable technology lead by Mika Satomi and Hannah Perner-Wilson aka Kobakant.

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After the workshop introduction and meeting round participants were split up into two groups to distribute the wide variety of skills. The background of participants was broad (ranging from industrial designers to fashion designers to hard- and software developers). As the average knowledge of the participants was quite high, the goal of the workshop was ambitious: create a performative sound experiment.

20090516_DSC_0409_101-0920090516_DSC_0406_101-08
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Organza touchpad development 2

Posted in Technology, V2_ with tags , , , on January 4, 2009 by Simon

This month I’ve made quite some progress with the transparent touchpad in metallic silk organza. With thanks to Piem who has sewn the thread paths and did the more difficult fabric crafting, I now have a working prototype touchpad.

Organza touchpad

touchpad internals

The prototype touchpad has 8 sensitive areas roughly the size of a man’s hand. All areas are embedded in a single layer of metallic silk organza. Only a light touch of one or more of the sensitive areas is enough to trigger. In total the pad has five layers (might increase to seven depending on the possible addition of a ground ‘plane’).

  • organza sensitive layer
  • two isolation layers (could be one depending on fabric quality)
  • component layer
  • two isolation layer (could be one depending on fabric quality and presence of ground plane)
  • possible ground plane

The sensing boards are constructed out of copper foil circuit boards (cut with a Roland CAMM-1 vinyl cutter at Protospace fablab Utrecht ) and conductive thread. They work by capacitively coupling a relatively high frequency signal put on the metallic organza sense areas. On the left is the A/D converter board (unfortunately TSOP-16 is too small for cutting).

In the movie I overlayed (slightly out of sync) the touchpad output as a bar graph. Only the first 4 (out of 8) outputs are functional in this test (the most left bars in the graph).