YAB » led http://blog.alexgirard.com Yet Another Blog Wed, 26 Nov 2008 23:44:35 +0000 http://wordpress.org/?v=2.6.3 en [Arduino] BBVA blogs-blinker http://blog.alexgirard.com/arduino-bbva-blogs-blinker/ http://blog.alexgirard.com/arduino-bbva-blogs-blinker/#comments Thu, 10 Jan 2008 23:54:21 +0000 alx http://blog.alexgirard.com/2008/01/10/arduino-bbva-blogs-blinker/ After a lot of debugging on bbvablogs.com, I needed serious fun to keep it up, and suddently I found the perfect project to remove the dust on my arduino board: a blinking led that would tell us when someone is visiting the website!

BBVA web-blinker

More links about this project:

]]> http://blog.alexgirard.com/arduino-bbva-blogs-blinker/feed/ [Arduino] 3D LED Cube http://blog.alexgirard.com/arduino-3d-led-cube/ http://blog.alexgirard.com/arduino-3d-led-cube/#comments Sun, 14 Oct 2007 13:28:40 +0000 alx http://blog.alexgirard.com/2007/10/14/arduino-3d-led-cube/ 3D LED cube

After a first try with tiny space between LEDs (see last post), here is another try with enough space to build a proper cube, still following MakeZine instructions.

The fun parts were to add transistors to the board, allowing to get more power for each led level, and the programming: Persistance-Of-Vision and binary manipulation for led on/off switching.

If you need it, you can download the arduino program related to this circuit.

]]> http://blog.alexgirard.com/arduino-3d-led-cube/feed/ [Arduino] Playing with LEDs http://blog.alexgirard.com/arduino-playing-with-leds/ http://blog.alexgirard.com/arduino-playing-with-leds/#comments Fri, 12 Oct 2007 01:26:36 +0000 alx http://blog.alexgirard.com/2007/10/12/arduino-playing-with-leds/ Arduino led-matrix The original project for tonight was to build a 3D LED cube, and the not-so-clever idea was to compact it the size of a normal dice.

Big mistake: first it was hell to solder all the tiny intersection of led cathods, then there is no way to pile up the array of leds if you don’t let space between them… maybe there’s a solution to that, and I’ve not find it yet.

Anyway, it was ready to connect to Arduino board, and to try to program this new led-matrix. Easy and fun, only problem is debugging messages while verifying source code on Arduino software that doesn’t help much, I’ll have to learn more about its syntax limitations.

Here is the result, 5 days before returning to Toulouse to visit Claire:

]]> http://blog.alexgirard.com/arduino-playing-with-leds/feed/ LED Throwies: I want some! http://blog.alexgirard.com/led-throwies-i-want-some/ http://blog.alexgirard.com/led-throwies-i-want-some/#comments Tue, 30 Jan 2007 01:28:29 +0000 alx http://blog.alexgirard.com/2007/01/30/led-throwies-i-want-some/

LED Throwies are an open source graffiti technology developed at the Graffiti Research Lab, a division of the Eyebeam OpenLab.

If you’d like to create you’re own LED Throwies, you can get more info on the instructable page, or watch this YouTube video.

I’ve already made some budget research on eBay:

  • Pack of 50 multicolor LEDs: 16$ - 9$ + 7$ shipping from China - Search for “10mm diffused led“
  • Pack of 25 CR2032 batteries: 7€ - 2€ + 5€ shipping from Honk Kong - Search for “CR2032“
  • Pack of 50 magnets: 12.74$ - 7.99$ + 4.75$ shipping - Search for Neodymium Magnets 1/4 inch Disc N48 Rare Earth

Another place to buy packs of LED Throwies from China at hebeiltd.com.cn

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