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segunda-feira, 23 de junho de 2014

Kinderlabs, Robótica prós Míudos! E mais uma Gravadora a Laser, um Material 10.000 mais forte que o Aerogel, e Moldagem em Papel

Eis algo que vai ensinar Robótica aos vosso filhos, desde tenra idade!
Uma maravilha, e nascida dum Projecto Didáctico...

our story

KinderLab Robotics emerged from a need to make widely available Marina Umaschi Bers' research on new technologies for young children at Tufts University.

Marina grew frustrated when presenting her work at conferences and always being asked: "How can I get a robotic kit?" and not having a good answer.

During a walk in Walden Pond, near Boston, her friend Mitch Rosenberg, veteran executive at several robotics start-ups, decided to join forces to fullfill an old-dream of his: improving STEM education.


E que tal gravarem os vossos Desenhos a Laser?
Podem fazê-lo, com mais este Instructable:

Yet Another DIY Diode Laser Engraver 
I always loved CNC machines! They are the future since they were first invented! I still believe that CADing and CNCing are miracles. When the first printer arrived to my home (I was about 10) I got really fascinated by the fact that I could print a paper about a hundred times by writing it just once!
Only recently I got comfortable with the parts and knowledge needed to built a CNC. I really needed a kind of plotter for my work. As you know a Commercial Laser Engraver is really pricey and a good one is simply out of reach...
To make a long story short I decided to build my own... The funny part is that when I started designing I didn't know Instructables so I reinvented the wheel in many cases...
So here we go: my Moving Gantry Arduino-Less Laser Engraver...

Ciclistas, Aeromodelistas, e outros Artistas, eis algo para seguir de perto, um Material tão leve como o afamado Aerogel, mas 10.000 vezes mais forte, sim, esta Material serve para muitas mais coisas!

New materials developed that are as light as aerogel, yet 10,000 times stronger

David Szondy

Imagine materials strong enough to use in building airplanes or motor cars, yet are literally lighter than air. Soon, that may not be so hard to do because a team of researchers from MIT and Lawrence Livermore National Laboratory (LLNL) have developed new ultra-lightweight materials that are as light as aerogel, but 10,000 times stiffer, and may one day revolutionize aerospace and automotive designs.
Aerogels are incredibly light, so light that the record holder, aerographene, boasts a density of just 0.16 mg/cm3. Currently, aerogels are used for insulation, tennis racquets, as a means of controlling oil spills, and were used on the NASA Stardust mission to collect samples from a comet’s tail. Unfortunately, despite its seemingly ephemeral nature, its very much a solid and will shatter if pressed hard enough, so its use is limited.

Eis algumas coisas novas, usar Papel para Moldagem, as Torres de David Huffman, e um Material sem cheiro para Moldagem, chamado Acrystal:

Casting with molds made with paper…

…or any other sheet material
Any cast starts with a mold. You need something to pour your material into, be it concrete, plaster, resin, wax, whatever. You can user everyday objects like bowls, packaging or make molds from existing objects.
But what if you want cast something completely different? Something you can't make casts of?
Paper to the rescue. Everyone has some lying around, has scissors and glue. And paper can take pretty much any form you want.
It does have it's limitations though. It's not waterproof and will lose it's strength when getting wet. So before you can use it as a mold, you'll have to make it waterproof. I'll just use spraypaint. Also it's strength is limited. So making huge casts doesn't work. The "Venus de Milo" is 36cm (14 inch) high - and it worked out just fine.
Paper is great to work with, it's easy to cut, fold and glue. But if you want to make more than one cast of your mold you might want to try sheets of plastic. While it is a lot harder to work with it is reusable. You can make many casts with the same mold over and over.
Here are two different routes I took

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