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1  Using Arduino / LEDs and Multiplexing / Re: I wrote a new library to PWM with chained shift registers (up to 768 outputs) on: July 20, 2011, 10:23:48 am
Nice, will try this out sometime; will be curious to see how it compares to using TLC5940's.
2  Using Arduino / Sensors / Re: Touch sensitive windows on: April 28, 2011, 09:40:31 am
Hi all, an update on this touch-sensitive windows project . . .

I ended up using the CapSense library for Arduino with a row/column electrode arrangement, thus only needing 11+1 i/o pins for each 5x6 array of windows.  Thin wire was used for the electrodes, with a row/column intersection centered on the back of each window.  Despite some noise/interference problems (mostly solved w/ grounding), this solution worked pretty well.

Each window was individually illuminated by a Shiftbrite, and the whole thing assembled in a fabricated steel structure.

I've written a detailed post about the (on-going) project here:
http://technoetc.net/blog/2011/04/27/urbana-2011/

Thanks again for your input and suggestions,
ao.
3  Using Arduino / Sensors / Re: Touch sensitive windows on: March 13, 2011, 01:27:44 pm
Thanks for the suggestions/comments -- I'll look into the piezo idea!
4  Using Arduino / Sensors / Touch sensitive windows on: March 11, 2011, 01:05:48 pm
Hi gang, not sure if this should be here in Sensors, or in the Interactive Art section.

I'm working on a an interactive light piece which is basically a large tower covered in windows:
http://www.technoetc.net/imgs/urbana_2011_gameplay_2.png

Each window will be translucent acrylic, and illuminated from behind.  To provide interaction, I'd like each window to be touch sensitive.  I'd like to use a capacitive sensing approach, but not sure if this will work until I do some experiments; I fear over such a large area capacitive sensing will be very noisy.

In the meantime, I'd love to hear any suggestions anyone might have as to how to detect users touching the windows.  I'd like to avoid having to use little buttons beside each window smiley-wink  Light or ir sensors might be an option, but I imagine will require a great deal of calibration.

The piece is still in the design stage, so I'd love to hear your suggestions/comments.

Cheers,
Andrew
5  Forum 2005-2010 (read only) / Development / Re: Wise4Sure on: February 17, 2010, 01:37:24 pm
They say necessity is the mother of invention smiley-wink

Thanks for the heads up re the connectors and the kits!

6  Forum 2005-2010 (read only) / Development / Re: Wise4Sure on: February 16, 2010, 12:55:33 pm
Nice job, the black PCB is great!

I'm a big fan of the Sure LED displays as well.  Where did you find the female headers, though?

Cheers,
ao.
7  Forum 2005-2010 (read only) / Interfacing / Re: Sure Electronics 6432 5mm board on: June 07, 2009, 11:25:58 am
Hi everyone,

First thing, thanks to everyone for their work and contributions to the code to get the Sure Electronics 6432 working with the Arduino.

I have tried all the example code here, and while it works, I have a ghosting effect on my display.

For instance, when I set_pixel(1,3,3), pixel 1,3 lights up orange, but so does pixel 1,4, faintly.  This ghosting effect is also present for the text character examples, with a few pixels faintly lit below each pixel that is supposed to be lit (per the character pattern).  It also occurs regarless of color.

I have rechecked my connections between the 6432 and the Arudino.  Could this be a defective board?

Any comments or suggestions greatly appreciated!

Cheers,
ao.
8  Forum 2005-2010 (read only) / Exhibition / Re: Do you make your own arduino's? on: January 26, 2010, 03:28:43 pm
I prototype w/ a regular Arduino USB board, then make a custom perf. board for permanent projects.

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