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Mostrar mensagens com a etiqueta bateria. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta bateria. Mostrar todas as mensagens

terça-feira, 17 de abril de 2018

Maslow! E desenhos para 3D, caixas para baterias, Brinquedos de toda a espècie, e Impressão 3D a Cores, MESMO!


Isto é que é  uma maneira incrível de ganhar dinheiro com o vosso Hobby!
Uma Fresa CNC que corta Placas enormes, e sem peças complicadas, e até ocupa menos espaço!

Já imaginaram o que podem fazer, de Caíaques a Mobília, passando por letragem e adereços para lojas?
E é tudo Open Source, pelo que podem até construír tudo em casa....




You are going to build amazing things.

Maslow is a community driven open source project with the goal of making large format CNC technology available to everyone. We believe in a world where people everywhere can collaborate, share, and build amazing things together.

What is the Maslow CNC Machine?

Maslow is a large (4'x8') CNC cutting machine designed to let you cut big, useful things out of wood and other flat materials. Cut out a tiny house, a kayak, a tree house, some furniture, or anything else you can imagine. Maslow is designed to be affordable to buy, cheap to ship, easy to use, and powerful. Because designs can be shared digitally, you can build on the work of others or create your own from scratch. Here is our Kickstarter video which is a little out of date, but explains the projects goals well.











Viram um Vídeo, ou uma Imagem, na Net, e querem criar algo no Mundo Real, mesmo a 3D?
Aqui vai este Instructable, deste vosso amigo, há tanto tempo nos Instructables, que lá estou, só com o meu primeiro nome...  
Sim, foi um dos primeiros.
Com o Inkscape, e o FreeCad, ou outros programas equivalentes, podem tratar de tudo, sem mais nada:








2D to 3D, Image to Svg to 3D
Edgar

I've become fascinated with those X-Ray Videos of working Mechanisms, and so, I wanted to make some MDF cut plates of them, just for fun.
So, I went to the Net to search for some 3D Files, but the ones I've found are crap, either Homemade Firearms, or 3D for movies, so I went to do them from scratch.
Here's my tips on how to do it;
How to turn any 2D image, into an Object, or into many parts of a 3D Project.












Nas Engenhocas que envolval alguma Electrónica, entram quase sempre as Baterias, e daí que caixas para as mesmas,  e aqui abaixo, têem como construír 4 tipos diferentes delas!
Claro que estas caixas podem alojar toda a Circuiteria...







Battery Cases for Electronic Kits.
liquidhandwash

If you have built one of the cheap electronic kits featured in my previous instructable, you probably want to put in some sort of case. Having your project in a nice looking case will really make your project look great and will impress your friends much more than a naked PCB with wires and a battery hanging off it. Your project should be something you can be proud of, take to a job interview and say look what I made!
This instructable will show you whats possible with a little thought and a laser cutter.
There are four types of cases shown here,
  •  Case without a battery or switch: The easiest to make but you will need to run a lead to your power supply.
  •  Case with a battery: Great if your kit has a switch.
  •  Case with a battery and switch: The most challenging to build, but some kits don't have a switch.
  •  Case with a push button, battery and switch.













Uma fonte infinita de Ideias, é decerto, o Pinterest.
Para dar apenas um exemplo, Vejam, embaixo, 97(!) Ideias para Brinquedos!



 
97 Examples of Tech-Free Toys
Katherine Pendrill

From DIY Paper Box Puppets to Wooden Coloring Books

While miniature robots and app-controlled playthings may be on the rise, there is still a growing demand from consumers for simple tech-free toys that allow children to embrace their imagination. Made from minimalist materials and featuring straightforwards designs, these timeless toys prove that children don't necessarily need the latest high-tech products.
For boys, there are a number of tech-free toys that are heavily focused on building. For example, there are home-inspired wooden building blocks, cardboard architecture kits and paper-based medieval toys, all of which offer boys the possibility of building their own creations from simple and uncomplicated materials.
For girls, these tech-free toys offer creative and artistic options that go beyond traditional plastic dolls. Some of the most innovative toys for girls are empowering coloring books, DIY paper doll crafts and miniature felt garden play sets. Despite their simplistic design and lack of smart technology, these tech-free toy options for girls are extraordinarily imaginative and highly educational.






E ESSE Link, para um Site interessantíssimo, é apenas UM dos milhentos que aparecem, apenas por inserirem "Toys" na tabela de Busca do Pinterest!
 





"Toys" result, on the search tab of Pinterest result!

It goes on, and on, and on...

https://www.pinterest.pt/pin/329325791495942746/?lp=true




 








E a famosa Marca de Impressoras de papel, HP, aventura-se agora na Impressão 3D, a core, mas mesmo a cores, com as cores que queiram a gradientes, e tudo!
E com qualidade dum produto saído da Fábrica!
É de seguir com atenção...








The amazing science behind HP’s new full-color 3D printers
Garage Staff

Today, HP unveiled its groundbreaking low-cost, full-color 3D printers at the annual SOLIDWORKS World 3D design and manufacturing trade event. The new HP Jet Fusion 300/500 printers are an industry first: capable of creating production-quality prototypes quickly, accurately and affordably — making advanced 3D technology accessible to a wider swath of digital innovators. And this huge leap forward in 3D printing began as HP explored a surprising realm of light — one that we’re unable to see.
Cheryl MacLeod, HP’s Global Head of 3D Fusion Science, leads the team of scientists and engineers at HP’s 3D Open Materials and Applications Lab in Corvallis, Oregon who are charged with developing the science behind the company’s portfolio of 3D printing materials. “We ultimately think of printing as a way to convey information,” says MacLeod. “And with 3D color printing, we now have an entirely new language.”
Breakthrough 1: Seeing the light
In developing the new Jet Fusion technology, HP’s 3D R&D teams called on the company’s deep expertise in the science of ink to create black fusing agents able to absorb heat at greater speeds, as is needed for 3D printing. But printing color with exclusively black agents isn’t possible, so a new solution needed to be found.
The new HP Jet Fusion 300/500 printers are an industry first: capable of creating production-quality prototypes quickly, accurately and affordably.
Courtesy of HP
The new HP Jet Fusion 300/500 printers are an industry first: capable of creating production-quality prototypes quickly, accurately and affordably.
HP’s scientists realized that they needed a primer coat of white on the outer layers of the black parts being produced so that color could be applied and fused. But how could you create a layer of white when all available fusing agents were black? A new kind of fusing agent was needed, so that the surface of the fused part remained white, but absorbed heat as well as black. And they found the answer in an unexpected realm of light — one that we’re unable to see.






quarta-feira, 17 de fevereiro de 2016

Cinco! 5 Dicas para 3D, Óptica, 5 Dicas de Baterias, Circuitos Impressos, e um Laboratório de Electrónica

Onshape, o fantástico Programa 3D Online, vem-vos dar 5 Dicas para causar uma boa Impressão, imprimindo Objectos de qualidade...





Top 5 Design Tips for 3D printing
Pinshape  

Designing for 3D printing can be quite different than designing for other purposes. Something that looks beautiful in your CAD program could be extremely difficult or messy to print which creates a frustrating experience for any Maker.

https://www.onshape.com/cad-blog/top-5-tips-for-designing-for-3d-printing






Optica e Impressão 3D, dica da Sculpteo, ora eis mais uma aplicação para a Impressão 3D,  que vai realizar muitos Sonhos de Engenhocas!


 


 
Engineers have a bright future in 3D printing & optics
Jess Hedstrom

The optical industry is one of the most exciting industries affected by additive manufacturing, as well as one of the oldest. The earliest known lenses were made from polished crystal in 750 BC and though we’ve seen upgrades to the industry over the centuries thanks to engineering, we are at the brink of an amazing breakthrough! 3D printers, both professional and desktop, are pushing the boundaries of what can be done. Today we are going to discover how this industry is being democratized before our eyes.
In this article we will uncover the benefits of 3D printing technology on lens + frame manufacturing, while at the same time discovering how the ocular medical industry is shifting thanks to the technology. We also dissect how LED lighting and virtual reality have utilized additive manufacturing to make giant leaps in the optical industry.

http://www.sculpteo.com/blog/2016/02/10/engineers-have-a-bright-future-in-3d-printing-optics/










Eis 5 maneiras de usar baterias, para vos facilitar a vida, com Ferramentas simples, e gastando pouco:







5 Simple Battery Hacks
by The Science Brony


Hello everyone, this is the science brony. I will show you a few innovative ways to use batteries for different things. They require very little tools and will save you money. As Pinkie Pie says: enough chit-chat! Time is candy!

http://www.instructables.com/id/5-Simple-Battery-Hacks/













Circuitos Impressos, e como os fazer com Químicos achados em casa, nas vossas Cozinhas!




Is the best PCB etchant in every kitchen ?
Feynmaniac

After a lot of reading and inspiring from Instructables for two years now I decided to step ahead and do my first Instructable on two subjects I particularly like : PCB making & The scientific method.
Feel free to comment and criticize my work, I think scientific method is also about improving and discussing the best way to experiment :) !
English is not my native language so please excuse my hesitating grammar.
5/30 Edit : I would like to thank you all for supporting this Instructables in the Scientific Method contest =D See you for other experiments !

http://www.instructables.com/id/Is-the-best-PCB-etchant-in-every-kitchen-/











E se têem pouco espaço, notem só esta solução para um Laboratório de Electrónica, num cantinho à maneira:





Make A One Desk Electronics Lab (in a small place, for beginners)
Imetomi

Living without closets and without a work room isn't easy, really don't like that I have a small room. We have a weekend house, that I'm visiting very often because I have a whole electronics lab there (with Arduino stations and many more), but here at home in my extremly small room I haven't enough space to make a fully functional lab, so I should be creative.
In this Instructable I'll show and explain you how to organize your desk to have everything that is neccesary for electronics projects. I'll show you that what kind of tools and parts are needed in your inventory. If you're a beginner hope I'll help you. I also will show you some life hacks that you may find useful. If you liked this Instructable let me know if you want to see my electronics workplace.

http://www.instructables.com/id/Make-a-One-Desk-Electronics-Lab-in-a-Small-Place-f/






terça-feira, 2 de outubro de 2012

Uma Mascote Cantora, Baterias com Açucar(!), e um, Sofá para Engenhocas, pois então!

Passemos sem demora a este uso genial e festivo dum Arduino, que nos mostra a Designspark, porreiríssimo!



Merry Christmas from Sergei the Arduino Singing Meerkat 

It's Christmas, and what better way to keep up the Christmas cheer at the RS Components & DesignSpark HQ in Oxford UK, than to modify a Singing Meerkat with an Arduino !

Sergei used to be a dull stand alone singing Christmas Meerkat, but now he's been connected up with an Arduino / Zigbee transceiver.  Sergei talks to a laptop over the Zigbee link.  The laptop also has an Arduino / Zigbee transceiver connected up to it via the USB port.  The laptop is connected to the Wifi network and is running a Google email API.  Sergei reads his mail every minute, if he gets an email from you he’ll dance and sing Christmas carols, which every one in the office loves.... ;0)

http://www.designspark.com/content/merry-christmas-sergei-arduino-singing-meerkat





Baterias com Açucar, eis algo que parece meio chanfrado, mas atenção, é bastante sério, pois as baterias ficam mais robustas, com maior capacidade, e sobretudo, mais baratas, que as actuais de Lítio:



The battery of the future might run on sugar

Dario Borghino

Researchers at the Tokyo University of Science have turned to sugar as part of a continuous effort to control Japan's growing import costs associated with building lithium-ion batteries. It seems that sugar may be the missing ingredient for building rechargeable batteries that are more robust, cheaper, and capable of storing more energy.
Lithium-ion batteries are ubiquitous in portable electronics, but concerns over rapidly growing demands for lithium – a metal that is mainly found in politically sensitive regions such as Bolivia, Chile, Argentina and China – have pushed countries like Japan to try and develop viable alternatives for a cheap, high-performance rechargeable battery.
Sodium-ion batteries have been put forward as one of the possible successors to lithium-ion technology. Among their advantages, they promise to be more durable and cheaper to manufacture. However, being in an early developmental phase, their performance isn't currently quite up to par.
Associate Professor Shinichi Komaba and his team have been working on narrowing this performance gap and recently discovered that sucrose – the main constituent of sugar – can be easily made into a cheap and effective material for the anode of a sodium-ion battery.

www.gizmag.com/sugar-sodium-ion-battery/24348/






Um Sofá para os Engenhocas! porque é que ninguém se tinha lembrado disto?
Com mais bolsos que sei lá o quê, eis algo que nunca desagrada à malta, para ter toda a tralha guatrdada!


Eastpak Sofa has more storage than you'll know what to do with

Dave LeClair

For anyone who has a ton of stuff in their house that they just cannot find a place for, this new Eastpak sofa might be right up their alley. It's sort of like a backpack and couch combined into one piece of furniture. It has pockets for your tablet, laptop, remote and almost anything else you could want to store in your couch.
This couch might look a little odd, but for people in small spaces where storage is at a premium, it could be a useful fix. It has pockets in a range of sizes, so you can fit all kinds of things in it – the fact is, only so much stuff can be shoved under the couch and in the closet.
The couch is made of polyurethane foam and Cordura, which are similar to what you would find on most backpacks. This makes it durable and able to withstand an active lifestyle without ripping. Of course, it might not be the most comfortable thing to sit on, but sometimes you can't have your cake and eat it, too.

http://www.gizmag.com/eastpak-sofa-backback/24359/




Eis como fazer algo de impressionante, transformar um Cubo de Rubik-Cofre, em algo tirado dos filmes do Indiana Jones! 


Mayan Rubik's Treasure Box

BrittLiv

In this Instructable I'm going show you how to turn a plastic Treasure Chest Rubik's Cube into a wooden one.

This cube reveals its inside once it is solved. Just hide your secret message and a fragile glass vial with a poisonous gas which will be released, should someone decide to break the cube out of frustration (Please, please don't poison anybody, I'm just kidding ;-)).







E para transformarem os  vossos Skates na solução para aquele kilómetro final de, e para, o Emprego, eis como instalar-lhes um Motor, e transformar assim um Skate comum, num Skate eléctrico!


LaGrange L1 truck motorizes existing skateboards

Ben Coxworth

With the current surging popularity of electric bicycles, it only makes sense that we’re seeing an increase in something else getting motorized – the skateboard. Just in the past couple of years, Gizmag has featured electric boards such as the Fiik, Gnarboard, ZBoard, LiquidRoam, and the Boosted Board. While all of those come as complete skateboards, Florida-based RedRock Boardshop is offering something a little different – the powered LaGrange L1 truck, that turns any board into an electric vehicle.

http://www.gizmag.com/lagrange-l1-electric-skateboard-truck/24364/



.

sábado, 14 de julho de 2012

DAVID, PSP, e Fresa!

DAVID, os nossos amigos do Scanning 3D, voltam à carga com este Scanner que vos pôe tudo em ficheiros 3D, e com uma qualidade indiscutível:

SLS-1 Structured Light Scanner

We are finally offering a complete scanner package for Structured Light scanning!

Features and advantages:

The SLS-1 scanner combines the latest DAVID software with perfectly suitable hardware for comfortable and flexible 3D scanning at a great value for money.
With an industrial camera, a high-quality lens, a specially adapted projector and solid calibration panels, the SLS-1 is suitable for industrial applications, however still affordable for ambitious hobbyists. Tripod, mounting rack, cables - the package contains all you need (Windows PC required).

As you may know, SL scanning is really convenient: No manual scanning, only one mouse click, and the 3D scan result appears on screen within just a few seconds. The calibration panels are no longer required during scanning - the SLS-1 scanner is mounted on a tripod and can simply be placed in front of the scanned surface. As usual for all DAVID solutions, the scan size is very flexible, from coin (0.08 mm resolution) to couch (500 mm scan area), or more.
And 360° scans can be created easily: Just like with our laser scanners, you simply collect several scans from all sides, then let the well-proven Shapefusion software align and fuse them into one closed model.


http://shop.david-vision-systems.de/product_info.php/language/en/info/p124_DAVID-Structured-Light-Scanner.html

 

 

 

E a PSP, a Polícia de Segurança Pública de Portugal, inova e bem, com a primeira encomenda duma Força Policial, duma frota de automóveis eléctricos.

Claro que Portugal é um País pequeno, com condições que exploram esses carros o melhor possível. E estes, vão ser usados para proteger as nossas Escolas. Mas exactamente por isso, é uma nova e boa tendência, por usar ao máximo o que funciona, e não ir em tecno-modinhas...

 

 

Portugal commissions world's first Nissan Leaf police fleet

By Chris Weiss

Portugal's Polícia de Segurança Pública (that'll be PSP from here on out) has put the world's first Nissan Leaf police car fleet on the streets. The eight-car fleet will help PSP in its goal to reduce its carbon footprint.
"We pride ourselves in being the first police force in the world to incorporate cars with zero-emission technology as part of our 5,000 vehicle fleet," Superintendent Paul Gomes Valente, National Director of PSP, said in a statement. "We want to continue contributing to the reduction in pollution in large urban centers and the introduction of the 100-percent electric Nissan LEAF sets a new benchmark for our fleet."


http://www.gizmag.com/portugal-worlds-first-nissan-leaf-police/23300/

 

 

...E a Fresa CNC tem um novo Programa da MecSoft, que vos optimiza a Fresagem para o Séc XXI.
E é claro que têem um Download Grátis, para testarem antes de comprar...



VisualMILL for SolidWorks 2012
  • 5 eixos continuos
  • Novo algoritmo
  • Versões a 32 e 64 bits
Desde 1250 €!

http://www.mecsoft-europe.de/testversionen.html?&L=1








Já temos o contacto da nossa Empresa de Artesanato usando corte laser, e já agora vai com uma foto de jeito:



https://www.facebook.com/oficinadopainatal

segunda-feira, 22 de agosto de 2011

Hobbistas e engenhocas, topem-me só isto!

Deparei com isto, e sim, podem comprar Quadracópteros aqui!

...Mas toda a espécie de coisas que lá se vendem, podem também servir para muito outro fim, Protótipos, CNC caseira, etc...

http://www.infinity-hobby.com/main/index.php



E uma maravilha duma dica da Sculpteo, um Webcast sobre Impressão 3D!


http://zcorp.fileburst.com/downloads/3DP1/player.html

quarta-feira, 29 de junho de 2011

Campos Magnéticos, guias no escuro, e CNC em casa

91,4 Teslas!
Um Recorde Mundial de força, num Campo Magnético!


German Lab Generates the Strongest Magnetic Field Ever Created
By Clay Dillow

Call it another victory for German design. Researchers in Dresden have set a new world record for the strongest magnetic field ever manufactured at the High Magnetic Field Laboratory Dresden (HZDR). Using a two-layer, 440-pound copper coil the size of a water bucket, they managed to coax 91.4 teslas from their creation for just a few milliseconds, surpassing the previous record of 89 teslas.

That’s a lot of teslas. Your standard high-power copper coil would be torn apart at something like 25 teslas, the researchers say. That’s because the magnetic field and the electric current that creates it work at cross purposes at higher energies. The current running through the coil generates the magnetic field, but the magnetic field pushes back against the electrons flowing through the coil. The stronger the current, the more the magnetic field pushes back, and once the current crosses a certain threshold the magnet will quite literally tear itself apart.

http://www.popsci.com/science/article/2011-06/german-lab-generates-highest-magnetic-field-ever-created-lab



Um cinto vibrátil, que orienta Soldados no escuro, talvez um dia,  essa tecnologia, mais barata, oriente Cegos, na vida civil:

Haptic Vibrating Belts Guide U.S. Soldiers Through the Darkness
By Rebecca Boyle
Soldiers already have plenty of nighttime tech to help them navigate battlefields, but goggles can be clunky and obtrusive, and backlit GPS displays can betray a lurking warfighter’s position. A new haptic interface developed by Army researchers will help soldiers feel their way through the darkness instead.
Researchers at the Army Research Office developed a vibrating belt with eight mini actuators — “tactors” — that signify all the cardinal directions. The belt is hooked up to a GPS navigation system, a digital compass and an accelerometer, so the system knows which way a soldier is headed even if he’s lying on his side or on his back.


http://www.popsci.com/technology/article/2011-06/new-haptic-system-guides-us-soldiers-through-darkness



E uma máquina de CNC feita em casa, por 300 Dólares!

Desktop CNC machine for $300 — an open hardware project on Kickstarter 

When Edward Ford told us about his plan to launch a Kickstarter project for his self-built CNC machine — made with SparkFun electronics and laser cut with his Personal Factory — we jumped at the chance to support his project.

The ShapeOko is a complete, desktop CNC machine that anyone can build for about $300. And its all open-source!

From the ShapeOko Kickstarter page: “From CAD and CAM software to the CNC controller; every step has an open source solution. Did we mention the entire project itself is open source? Every nut, every bolt, every belt, fully documented with part numbers and vendor list. Do with it as you please!”

The goal is to finalize the ShapeOko design, make it repeatable, and then freely distribute it under an open source license.

And project funding will go to finishing the design (purchasing materials, paying for laser cutting time, testing new designs, and exploring ways to drive the final build cost even lower than $300)

This project needs just $1,500 by July 26th.

http://blog.ponoko.com/2011/06/28/desktop-cnc-machine-for-300-—-an-open-hardware-project-on-kickstarter/

terça-feira, 14 de junho de 2011

Isto é importante!

Carros eléctricos que se recarregam como os a Gasolina?
Isto é importante...

'Cambridge crude' could let EVs refuel like gas-powered vehicles


By Darren Quick

With consumers used to the convenience of refueling their vehicle at the gas station in a few minutes, one of the biggest disadvantages of electric vehicles is the time it takes to recharge their batteries. Now, by separating the energy storage and energy discharging functions of the battery into separate physical structures, researchers at MIT have achieved a breakthrough that could allow EVs to be recharged in the same time it takes to refuel a conventional car. The technology could also provide an inexpensive alternative for energy storage for intermittent, renewable energy sources such as wind and solar.

http://www.gizmag.com/semi-solid-flow-battery-design/18907/

quinta-feira, 19 de maio de 2011

Um Instructable dum Lusófono

Está bem, é mesmo dum Brasileiro, mas "Lusófono" soa bem.

É a versão baratucha desta experiência, também dele,

A versão mais elaborada,
 A mais rápida e barara:

E o Instructable está aqui:
http://www.instructables.com/id/This-High-Voltage-Click-Clack-Toy-Rocks/
Porreiro!

sexta-feira, 15 de abril de 2011

Progresso nos Painéis Solares

Uma descoberta deu origem à utilização DIRECTA  da Luz Solar, isto é, uma transformação da luz num campo magnético forte, MUITO IMPORTANTE para os nossos Países cheios de Sol...

Discovery paves way for “optical battery” to generate solar power without solar cells

By Darren Quick

It has long been thought that, even though light has electric and magnetic components, the effects of the magnetic field are so weak that they could effectively be ignored. Now researchers at the University of Michigan (U-M) have discovered that under the right conditions, a light field can generate magnetic effects that are 100 million times stronger than previously expected. The researchers say the discovery paves the way for the creation of an "optical battery" that could harness power from the sun without the use of solar cells.
Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics, and his colleagues found that if light focused to an intensity of 10 million watts per square centimeter (W/cm2) is traveling through a material that does not conduct electricity, such as glass, the light field can generate magnetic effects with the strength equivalent to a strong electric effect.



Uma nova protecção para os Aviões a Jacto, contra a areia e até doses pequenas de cinza de vulcão...

New coatings could protect jet engines from volcanic ash

By Ben Coxworth

Following last April's historic eruption of the Eyjafjallajökull volcano in Iceland, commercial flights were cancelled within most of Europe for several days – it was the largest disruption of air travel since the Second World War. Well, while no one is suggesting that airliners could now merrily fly right through clouds of ash, researchers from Ohio State University (OSU) have developed a coating that they say could allow jet engines to better withstand small amounts of volcanic ash that are ingested over time.
The metallic parts of jet engines are already coated with a ceramic thermal barrier coating, that allows them to withstand the 2500F (1371C) temperatures that occur during regular operations. When volcanic ash is sucked into an engine, however, it melts onto the coating and penetrates it. That ash becomes a brittle glass upon cooling and it flakes off, taking the coating with it.





E um Plástico barato de produzir avisa da deterioração dos alimentos...

Inexpensive plastic developed that indicates freshness of food

By Ben Coxworth
When it comes to buying packaged meat and fish, consumers usually just have to go by the "best before" label to know that it hasn't begun to spoil. Needless to say, the dates on those labels are just estimates and certainly won't tell you if the product has sat through a lengthy power failure, or been left out of the cooler for several hours. Researchers from the Fraunhofer Research Institution for Modular Solid State Technologies in Munich, however, have developed an inexpensive plastic film that will change color in the presence of rotten foods.
The film would be applied to the inside of food packaging, where it would respond to the biogenic amines produced by decaying meat or fish. If a sufficient amount of amines were present in the air within the sealed packaging, they would cause dye in the film to turn from yellow to an obvious blue.

quinta-feira, 9 de setembro de 2010

Uma Invenção do caraças!

Àgua própria para o consumo...
Porque se ELETROCUTARAM as Bactérias!


20 Volts chegam, são mortas instantâneamente, e com uma voltagem tão baixa, até se pode produzir a Electricidade à Manivela!

Zap, They're Dead! New Water Filter Electrocutes Bacteria

Analysis by David Teeghman 

America has some of the cleanest drinking water on Earth, but in many developing countries, clean water is oftentimes hard to come by. Bacteria and other nasty organisms give rise to such waterborne illnesses as cholera, typhoid and hepatitis.

Many scientists are working on inexpensive and simple technologies that can clean water and make it safe to drink. Among them are Yi Cui and his colleagues at Stanford University, who have developed a new type of water filter that is 80,000 times faster than existing filters and less expensive than what's available today. It doesn't cost much because there are no moving parts and it uses very little power.

Just about everyone I know has some type of water-filtering pitcher in their refrigerator, or one hooked up directly to their faucet. While those filters physically trap most bacteria from flowing into water, this new nanofilter actually lets bacteria flow right through.

Instead, those bacteria pass through several layers of cotton, where an electrical field zaps them with 20 volts of electricity for several seconds. It's a technique that researchers have dubbed conductive "nano-coated" cotton. Twenty volts is barely enough to make a human tingle, but tests found that more than 98 percent of Escherichia coli bacteria were killed instantly.


And because the voltage is so low, it doesn't require serious electricity generation. A person could generate the power from a stationary bike or a hand-cranked device. No pumping is required either. The force of gravity is enough to allow the water and its nasties to pass through the cotton and get zapped!

quinta-feira, 22 de julho de 2010

Instructables e Notícias

Um projecto Fm com o Arduino:


http://www.instructables.com/id/Arduino-FM-radio-receiver-shield/

E para algo completamente diferente, cultivar Cogumelos com borra de café e copos de plástico:


http://www.instructables.com/id/Gourmet-mushrooms-in-an-old-coffee-cup/


Mais uma notícia de Astronomia, uma estrela realmente grande:

Scientists Discover Most Massive Star

Published July 21, 2010


LONDON -- A huge ball of brightly burning gas drifting through a neighboring galaxy may be the heaviest star ever discovered -- hundreds of times more massive than the sun, scientists said Wednesday after working out its weight for the first time.

Those behind the find say the star, called R136a1, may once have weighed as much as 320 solar masses. Astrophysicist Paul Crowther said the obese star -- twice as heavy as any previously discovered -- has already slimmed down considerably over its lifetime.

In fact, it's burning itself off with such intensity that it shines at nearly 10 million times the luminosity of the sun.
"Unlike humans, these stars are born heavy and lose weight as they age," said Crowther, an astrophysicist at the University of Sheffield in northern England. "R136a1 is already middle-aged and has undergone an intense weight loss program."


Baterias melhores e mais seguras para os Automóveis:

Safer, Longer-Lasting Batteries for Cars

A startup company has a printing method for solid-state batteries.

By Katherine Bourzac

An Orlando startup has developed new manufacturing techniques that could improve the stability and lifetime of batteries used in electric vehicles. Planar Energy, a spin-off of the National Renewable Energy Laboratories (NREL), is working on scaling up solid-state lithium-ion batteries.
Conventional batteries, which typically use a liquid electrolyte, can suffer from undesirable chemical reactions that damage the battery's cathode. Replacing the liquid electrolyte with a solid ion conductor can improve battery stability and lifetime, and also allow a battery to be smaller because additional components aren't needed to maintain stability. Solid electrolytes are also compatible with a wider range of battery chemistries that could potentially offer higher power or storage density.

But solid-state batteries are expensive to make and have been difficult to scale up to the size needed for laptops or vehicles. Like other solid-state devices, solid-state batteries are normally made using complex, costly, vacuum-based deposition methods. The vacuum deposition limits the thickness of solid-state batteries, which, in turn, limits their energy storage capacity. So these thin-film batteries have been limited to use in small devices.

http://www.technologyreview.com/energy/25825/

E Micro-cápsulas que comunicam como as Células!

Synthetic Cell-Like Microcapsules Communicate Like Biological Cells, Cooperate Like Ants
By Clay Dillow Posted 07.20.2010 at 5:02 pm

Taking cues from slime molds, ants, and living biological cells, a team of University of Pittsburgh researchers has designed a system of artificial cells that can communicate with one another and cooperate to carry out tasks. The computer models they've devised could lead to artificial cellular systems that perform highly specialized jobs at the microscopic level.
The artificial cells are more like microcapsules that can move independently and deposit cargo wherever it's needed. But directing these microcapsules -- or more accurately, getting them to direct themselves -- is the real breakthrough.

http://www.popsci.com/science/article/2010-07/synthetic-cell-microcapsules-communicate-biological-cells-cooperate-ants

terça-feira, 6 de julho de 2010

Novidades

Um Gel que vai substituir os Chumbos nos dentes, encher os canais das Raízes, e, mais tarde, ajudar a regenerar Ossos e Tecido!
Toda a gente vai passar a gostar dos Dentistas!


June 30, 2010
Gel Could Replace Fillings for Cavities and Replace Root Canal and Later Help Heal Bones and Tissue

A new gel could soon eliminate painful fillings and root canals.
* The technology doesn't prevent cavities; it heals teeth by regenerating them.
* Although this is good news for teeth, the research could also be applied to heal bones and other tissues in the body.

* Teeth Regeneration will only be used rarely. If a filling will work, then dentists will stick with the current cheaper and familiar option.
A new peptide, embedded in a soft gel or a thin, flexible film and placed next to a cavity, encourages cells inside teeth to regenerate in about a month, according to a new study in the journal ACS Nano.

Novas Baterias, muito mais avançadas, mas não para já...

A Guide to Recent Battery Advances

Battery breakthroughs could lower costs and improve performance for electric vehicles and renewable energy storage--but commercializing these new technologies will be challenging.
By Kevin Bullis

...The MIT researchers demonstrated a new battery electrode, based on specially treated carbon nanotubes, that last for thousands of cycles without any loss in performance. Batteries made from these electrodes could deliver enough power to propel large delivery vans or garbage trucks, for example, without the batteries being too heavy to be practical. (The researchers need to increase the thickness of the electrodes for them to be practical in these applications.) Companies such as A123 Systems, based in Watertown, MA, have also developed very high-power lithium-ion batteries, and other academic groups and startups are developing carbon nanotube-based ultracapacitors, which store energy using a different mechanism than batteries that's particularly useful for high power and long life.

Vejam o Vídeo

http://www.technologyreview.com/energy/25660/

Um novo Fármaco para domar o Apetite...

Scientists find natural way to curb your greed

July 5, 2010
(PhysOrg.com) -- University of Manchester scientists have discovered a naturally-occurring appetite suppressant that could be used to make a diet drug without side effects.
Professor Simon Luckman and Dr Garron Dodd believe the peptide hemopressin, which affects the reward part of the brain responsible for hedonistic behaviour, might treat some aspects of alcohol and drug abuse.
Dr Dodd, co-author of the findings published in the , explains: “It has long been known that the rewarding aspects of feeding behaviour influence our appetite, so that sometimes we eat for pleasure rather than hunger. This is because the cannabinoid system in the brain - a component of the naturally-existing circuitry responsible for reward - is affected by chemicals that are termed ‘agonists’ which bind to its receptors and increase the reward from feeding.

http://www.physorg.com/news197537769.html

Um novo material que poderá efectuar funções de Lógica E de Memória, o que quer dizer que os futuros PCs poderão não precisar de Discos Rígidos!



Logic test: Arrays of memristors located where these electrical contacts converge can perform logic and memory functions.
Credit: Wei Wu

Source: " 'Memristive' switches enable 'stateful' logic operations via material implication"
R. Stanley Williams et al.
Nature 464: 873-876

Results: Researchers at Hewlett-­Packard have shown that nanoscale circuit elements called memristors, which have previously been made into memory devices, can perform full Boolean logic, the type used for computation in computer processors.

Why it matters: Memristor logic devices are about an order of magnitude smaller than devices made from transistors, so they could pack more computing power into a given space. Memristor arrays that perform both logic and memory functions could eliminate the need to transfer data between a processor and a hard drive in future computers, which would save energy.


E Baleias Pré-Históricas que caçavam outras Baleias, como as Orcas, mas do tamanho dum Autocarro!


Gigantic Prehistoric Whale Hunted Other Whales

By Jeremy Hsu, LiveScience Senior Writer
posted: 30 June 2010 01:08 pm ET

A prehistoric leviathan that represented a more savage Moby Dick once hunted smaller whales around 12 million or 13 million years ago, researchers say.
Fossils of the whale's skull and foot-long teeth found in Peru suggest the monstrous sperm whales ranged in size from almost 43 feet (13 meters) to 59 feet (18 meters), or longer than a school bus. Just the skull alone reaches a length of almost 10 feet (3 meters).
The ancient sperm whale's killer arsenal included 14-inch- (36-cm)- long teeth resembling elephant tusks that allowed it to rip and tear its prey, unlike modern sperm whales that lack functional teeth in their upper jaws and rely upon suction to grab giant squid.