May 21st, 2010
For the Super Mario brick I used a Super Mario sound drop keychain (from a space oddity in Amsterdam).
These sound drops do actually have four sounds but only one is exported to the outside using the big front button. Once opened up you can see four pairs of pads of which one pair is shorted, that is the current sound under the button. The sound is activated by pressing the button which provides the chip with power.
With the pad desoldered you can choose which sound is played by shorting a pair of pads and pressing the button.
For the Mario brick we want to use all four sounds but play them randomly with a weight on the coin sound. To do this I use a 4017 decade counter. When a button is pressed the counter counts with a high frequency (~150KHz). As soon as the button is released the the sound drop is activated with the output the counter stopped on. In order to get the weighting 5 outputs of the counter are joined together and activate the coin sound.
All together the circuit draws 0.1mA of current when idle, 2mA if the button is pressed and 25mA when the sound is played.
Together with one of those cheap wireless doorbells I got myself a nice doorbell :-)
Tags: Craft, DIY, Electronics, Hacking, Toy
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June 15th, 2009
Apparently Nadya Peek and I were on the same track around the same time :)
Here is her nice instructable on how to make circuit boards using a vinyl plotter:
How to make circuits with a Roland CAMM sign cutter
I prefer to solder the circuit while on still on it’s original backing as the thin fabrics I use melt very easy.
Tags: DIY, Electronics, Wearable
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June 7th, 2009
Just a repost of my previously posted fabmoment.
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.
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Tags: Electronics, fablab, soft, Wearable
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May 21st, 2009
[flickr video=3308870160 w=240 h=192]
An experiment making a two pixel display using a sheet of liquid crystal thermochromatic ink and nichrome wire.
The pixels are controlled independent from each other and switched consecutively. The total current drawn is approximately 80mA independent on the number of pixels.
The metal ring on the left is there just to keep the autofocus of the camera focused.
Posted from JoSoS on Flickr: Thermochromatic two pixel display
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May 21st, 2009
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.
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.
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Tags: DIY, Electronics, soft, V2_, Wearable, Workshop
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April 24th, 2009
Finished my wireless RFID set, from left to right:
- Desk reader/writer (non-wireless)
- Receiver (receives the IDs send by the transmitter
- Transmitter (reads and immediately sends RFID tags over a 433MHz radio link)
Tags: Aram Bartholl, Electronics, RFID, V2_, Wireless
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March 17th, 2009
Sharewear on dance-tech
@ Eyebeam’s Mixer 09 party expo, March 07.09
Tags: Luxeon, RFID, Sharewear, Wearable
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January 16th, 2009
Just added a fabmoment describing the Cutout Circuit Boards
Tags: fablab
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January 4th, 2009
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.
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).
[youtube=http://www.youtube.com/watch?v=gREXHNLE8OU]
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).
Tags: Craft, Electronics, soft, Wearable
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