La gente de Kawamura Ganjavian ha desarrollado un bolso para mujer llamado Glowing Purse destinado a ahorrarte todos los largos ratos de búsqueda infructuosa de las llaves, móvil, agenda, etc dentro del bolso, esos momentos que inevitablemente siempre ocurren cuando más prisa tienes.

Según el fabricante, la mujer europea media gasta nada menos que 14,3 horas anuales buscando en los bolsos. Aún sin tener ni idea de qué estudio habrá resultado con este dato, estamos de acuerdo en que la búsqueda por tacto y meneo de objetos al azar no es la mejor opción, así que nos quedamos con la idea.

El Glowing Purse incorpora una serie de micro-LEDs funcionando con batería recargable, colocados dentro del forro interior del bolso. El invento nos ofrece también un interruptor para apagar y encender las lucecitas a gusto.

Todo y que de momento es solo un concepto, esperamos verlo en las tiendas en breve. Además, nos vemos obligados a motivar a los manitas con la idea, un proyecto hazlo-tu-mismo basado en el Glowing Purse puede salvar más de un regalo de aniversario.

But what's Charlieplexing?

Charlieplexing has almost the same idea. But here it is for driving LED's from less number of pins .

So whats the use of this technique?

You can drive a large number of LED's from a less number of pins. You might be saying that it is possible using a multiplexer.The answer is not wrong. But it will be hard for a huge number of LED's.

See this example http://home.wanadoo.nl/electro1/avr/kitt.htm

See the explanation in Wikipedia

" Charlieplexing is an electronics technique developed by Charlie Allen (hence the name) at Maxim in which relatively few I/O pins on a microcontroller are used to drive a large number of LEDs.

With Charlieplexing, n drive pins can be used to drive n digits with n-1 segments each; in other words, n drive pins can be used to control n²-n LEDs. Traditional multiplexed display technique would take 2n drive pins to control n² LEDs.

Charlieplexing works by having the I/O pins alternate between driving digits and driving segments."

You can find more info fron the wiki page for Charlieplexing

Check these for more

http://www.instructables.com/id/Charlieplexing-LEDs--The-theory/

http://www.instructables.com/id/How-to-drive-a-lot-of-LEDs-from-a-few-microcontrol/

http://www.maxim-ic.com/appnotes.cfm/appnote_number/1880

http://home.wanadoo.nl/electro1/avr/charlieplexing.htm

Davis notes that extending lamp life nearly indefinitely (conventional life: 300 - 1200 hours; LED life: 100,000+), eliminating the need for swapping gel in instruments, and lower lamp temperature are just a few of the "attractive" benefits of LED fixtures. However, Davis also notes that while there have been several LED instruments introduced for theatrical use, "none have the beam control that theatrical fixtures such as the Leko and Fresnel have."

But wait. According to Davis, the only LED fixture on the market that comes close to providing what a theatrical lighting designer needs is the Selador X7. The instrument from Selador "uses a seven-color system to achieve a wide spectrum of colors that include the pastel range," writes Davis. It is a strip light type instrument, and has seen competition since its introduction now that Altman is producing a similar unit called the Spectra Cyc.

But here is what I think is the key part of the article:

"The ideal LED-powered theatrical lighting fixture would not just save energy; it would save labor costs in several ways. Lamp life could be extended far beyond the hour rating of a standard theatre fixture, saving lamp replacement labor and the associated trouble shootinig time. If an LED fixture had a color-mixing method that could achieve the color range of gel, there would be no need for the labor expense of color changes. The heat generated by dozens of lighting fixtures would not compete strenuously with the air conditioning, therefore saving energy costs. Another cost-saving benefit of LED fixtures is the elimination of conventional dimmers. LED fixtures could have efficient on-board dimming that only requires line voltage and a control signal."

The LED is on its way.

testing 123

soldering connections

the finished product

mounting around the ceiling!

I have half of the lights up, hopefully i'll get the other half up this weekend, i'll try and take a picture this evening as the effect at night is a lot more brilliant, and the house emits a stunning glow. i dare ask what the neighbors think.

UPDATE: this doesn't do it justice but here's a little of the spooky evening glow.

right now the colors are controlled with potentiometers (aka nobs) but i'm hoping to replace them with an Arduino micro controller. That will be my project for next week!

I still need to find something to stop the hood sliding down and also the sling that carries the little laptop on my back slips off my shoulders so I need to do something about that too.

Performance notes are that I can't see very much in there.  I have a spandex hood over my face which has no eye holes.  This means that the lenses are completely black which is very cool but means that I can't see any details.  Add to that some misting of the lenses and I can only really see enough to get around but I can't operate anything.  Other than that, the costume isn't very hot, it's light.  The laptop weighs very little and doesn't get in the way.

           There are also some LEDs in the middle of the headlights.  They'll be hooked up another time.  I think I might get him a black billet grille for his next birthday.

-SO

By now, plenty of us have read articles like the recent NY Time lengthy examination of the future of Light Emitting Diodes as low-consumption replacements for incandescent and fluorescent lighting. This article in particular, from last Monday's paper cites a number of indicators, from the famed New Year's Eve Ball in Times Square (pictured) to more pedestrian applications like factory and home lighting.

US fast food chain Chipotle has announced that it's currently installing all LED lighting in its new Minneapolis store, and a spokesman "expects LEDs to be in the overwhelming majority of new restaurants next year." In Detroit, a local bar uses LEDs and claims to light the entire place with the equivalent consumption of two incandescent bulbs (which they quote at "130kW" -- my physics is a little rusty, but I think "130W" might be more correct).

LEDs are enormously appealing to designers for lots of reasons: the aforementioned efficiency, of course, but also their amazing flexibility and longevity.

Fuseproject famously took advantage of the color control LEDs can offer in their Leaf Lamp for Herman Miller, allowing the user to adjust not only brightness but also the warmth of the light, to great effect. The minute points of light LEDs create also offer endless opportunities for clustering, distributing and shaping illumination, a fact that designers like Ingo Maurer have seized upon and run with.

The catch, of course, is price. Philips Lighting plans to introduce its first LED lightbulb replacements for home use this September in the Netherlands, at 69 Euros (US$107) a pop, while Sharp is making a similar move in Japan, with lighting systems ranging from US$420 to US$1856. This makes LEDs, at present, good for two things: high-demand applications where durability and low operating cost makes the investment worthwhile, and consumer lighting for those with deep, deep pockets.

There's a dilemma here for lighting designers: focus on an emerging, low-impact, low-consumption technology that offers candy-store-like creative opportunities, or focus on the technology that most of the world's consumers can actually afford? It's not often that "sustainable design" and "design for the other 90%" are so clearly in opposition, but this would appear to be the case, at least for the time being.

report posted on core77.com

Pixsurface (2008) es nombre de la idea o anteproyecto que he decidido enviar este año a la segunda edición de Disonancias, desgraciadamente os lo enseño a estas alturas,porque después de haber entrado entre los cuatro proyectos  seleccionados por el jurado para presentar a la empresa Ezarri esta ha decido rechazar mi idea, a pesar de haber demostrado bastante interés por la propuesta. Desde aquí aprovecho para enseñaros el parte del proyecto y agradecer a la gente de Disonancias por llevar a cabo esta propuesta de colaboración e investigación entre empresas y artistas, sin duda de las mas interesantes en nuestro país.

Aquí os dejo unos esquemas para comprenderlo mejor.

La intención fue en breves palabras, la de dotar a los mosaicos que fabrica Ezarri de la capacidad de generar gráficos luminosos utilizando cada pieza como si fuera un pixel a si como de un acabado semitranslucido, creando un abanico de posibilidades tanto en campo de la señalitica (integrando diversos mensajes y signos en los mosaicos), como el de un nuevo uso ludido, estético o interactivo de este material.

Otros usos posibles.

Pero otro punto de vista respecto a este tipo de publicidad es ubicarlo en lugares (como ese en Calzada Rooselvelt) donde haya mucho tráfico, por lo cual el flujo vehicular sea lento y no perjudique en la circulación del lugar y al mismo tiempo llame la atención de gran forma de los transeúntes del lugar.

Tuvimos la suerte de que nos acompañen los chicos de Urban Boyz, agrupación hip hopera y grafittera de la ciudad, que aportaron su experiencia obtenida en miles de paredes de la ciudad.

Presentamos el nuevo aerosol de luz, más potente y concentrado que el anterior y obtuvimos mejores resultados. Acá les dejamos unas fotos del aerosol, su construcción y de la presentación en el museo.[gallery]

How is LED Brightness related to current?
led.linear1.org

So let’s review what’s typical: for 3mm and 5mm indicator-type LEDs, datasheets often list a typical forward current of 20mA. Forward voltage will depend on the junction material of the LED, but let’s use a white LED as an example. 3.3V would be a typical forward voltage at 20mA. So applying the series resistor calculator, we get a curent-limiting resistor value of 85 ohms (100 is the next largest standard value), and a power dissipation in the LED of (3.3V * 0.02A =) 66mW.

Very detailed info on LEDs - everything you ever wanted to know
Gizmology

Luminous flux = amount of light being put out

Brightness vs. viewing angle
Keep this in mind when buying LEDs for illuminating purposes - a 2000 mcd 30° LED puts out just as much light as am 8000 mcd LED with a 15° viewing angle. (The angle is half in both width and height, so the beam is four times as bright.) This is one of the reasons that ultra-bright LEDs are often "water clear", to keep the light going in one direction and not diffuse it all over the place.

Com 12 anos de profissionalismo, este ano a convenção internacional de tatuagem, acontecerá nos dias 17, 18 e 19 de outubro, em São Paulo, Brasil.

Mais de 140 expositores estarão presentes, renomados tatuadores e body piercer do país e do mundo.

Durante a convenção ocorrerão vários eventos como o tradicional Concurso de Tatuagens, lançamentos de livros, exposição de fotos e pinturas.

Vale a pena conferir e levar a garotada.

Este é o mapa do expositor:

http://www.tattoobrazil.com.br/planta%20copy.jpg

Os horários são das 12 às 22 horas no Espaço das Américas que fica na Rua Tagipuru, 795, bairro Barra Funda.

Mais informações, acesse o site: http://www.tattoobrazil.com.br/#expositores

É uma diversão garantida para toda família!

Não julgue as pessoas pela arte que elas carregam nos corpos!

Beijos,

Freak Butterfly

O detalhe mais interessante é que as peças tem detalhes de crochê e outras formas bem artesanais + tecnologia. O resultado é muito mais mágico do que futurista.

Ich empfehle eigentlich immer das persönliche Gespräch am Telefon zu suchen. Vielfach merkt man dann sofort, ob der angebliche LED-Fachmann auch wirklich Fachmann ist, oder nur, wie mittlerweile ein Suche bei Google oder anderen Suchmaschinen ergibt, einer von vielen ist, die zwar einen Onlineshop programmieren können, aber sonst fachlich nicht vom LED und Lichttechnik auf der Pfanne haben. Suchen Sie das persönliche oder telefonische Gespräch mit dem Fachmann...

Eine andere Möglichkeit sind die bekannten Shoppingportale, die für Sicherheit und faire Abwicklung stehen.

Hier eine kleine Auswahl von empfehlenswerten LED Onlineshops für LED, LEDs, LED Leuchten und sonstigen Leuchten mit LED Bestückung.

LTE Lichttechnik Essen  Persönliche Beratung wird groß geschrieben. Jeder Kunde hat seinen festen Ansprechpartner. Wer im Ruhrgebiet wohnt, kann sich auch die LEDs direkt im Ladenlokal abholen.

Lichtmitte Berlin  Professioneller Leuchten und LED Onlineshop in der Mitte von Berlin

AMAZON.de  Der wohl bekannste Versandhändler bürgt für die Auswahl seiner LED Lieferanten.

MERCATEO Der MEGA Händler für Geschäftskunden im Internet. Große Auswahl von LED-Produkten für den gewerblichen Einsatz und BestBasket Funktion. Angebote ausgewählter und vertrauenswürdiger Händler werden verglichen und optimiert.

GSTW Onlineportal Gut sortierter Onlinehandel mit vielen Hersteller und LED Leuchten

KS Licht- und Elektrotechnik GmbH LED Hersteller Onlineshop. Für alle die lieber den direkten Draht und entsprechenden Support zum Hersteller durch Lichtplanung etc. benötigen oder sich vor Ort im Showroom live über LED und ihre Lichtwirkung informieren möchten. Besonders gut geeignet für gewerbliche Kunden und WIederverkäufer. Händleranmeldung beachten!

Besserer Baumarkt  Großes Angebot nicht nur an LED Leuchten, sondern auch viele andere Produkte.

Viel Spaß beim stöbern in Sachen LED.

Como es más complicado de explicar que de ver, pongo un cutre-vídeo hecho con el teléfono en el que lenna se mueve por la pared siguiendo a la superficie.

Esperamos pronto tener nuevas ediciones de este serial.

Is easier if you see it, so we have posted here a small Mobile video where you can see how lenna moves around the wall following the surface. We hope to have new editions of this series soon.

I really want to start creating instruments like this. Nerd instruments, but awesome, nonetheless! This particular one is made from old video tapes + a tapehead from an old walkman and some other components I'm not so sure about. But I'm determined to find out how to make it and play it, and other awesome techno-instruments cuz they make such different, distinctive sounds that are fun to build too.

Speaking of building things, I found a web site call Instructables.com.  It has tutorials and picture walkthroughs of seemingly everything you can imagine. Also, they have random projects that people have done on there and how to do them. I read how to build an LED-lit chess set the other day - these nerds and their LEDs - everything has LEDs.

Speaking of LEDs (and yes, I know that was the same transition - it's my favorite), I'm going to put some in my old mac. Let me explain. Last summer, I tried to make a Macquarium out of an old Mac+. You just gut the casing of all the components and screen and put a fish tank inside. This project stopped after we spent 3 hours constructing a tank out of plexiglass only for it to crack overnight. So maybe I'll reawaken this project, or I'll put a sculpture in there and here it is - put LEDs in the top to illuminate the sculpture. I just need a sculpture now.

I can already think of two modes, one displays each channel static in its position, and another mode has them slowly rotating around the globe.

There is a bigger version of the brookstone sphere already available, but all those spheres use only one color of leds.. your turn to pump up the resolution and frame refresh rate ;-)