Íman reversível! E mais uma Cortadora Laser CNC feita em casa, uma ideia do caraças, Pinos-Mola, Genuino, e desenhem a vossa Impressora 3D!

Cá está, da minha lavra, um arranjo magnético Halbach que ou atrai ou repele outro, por rodar sobre si próprio, invertendo a polaridade...

Pode funcionar por alavanca, ou por Rotação:

An aplication of the Halbach Array, by wich, groups of Magnets, each set 90 degrees to the next, have almost all the magnetic attraction concentrated on one side, i.e. a Monopole Magnet. In this case, the top Magnets, by the lever on the back, turn 180 degrees, so as to either attract or repell the sliding bottom array, thus creating a switchable magnet array, out of permanent Magnets. 

 

Aqui vai mais uma maneira de começarem a vossa Oficina CNC, e/ou a vossa Oficina de Aeromodelismo, etc. 

Uma máquina de Corte Laser CNC, que vocês fazem em vossas casas!

CNC Laser Cutter Journey

Arno1978  

I want to share with you the journey had had , creating my very own CNC laser cutter.

This projects is about 2 years in the making, due to research and development, and spending allot of time on www.instructables.com it took me a bit longer than anticipated , but I finally decided to start building my very own CNC laser cutter in the middle of 2014.

Motivation behind this was that I fly and build model airplanes , and wanted an easier more precise method of manufacturing parts for these planes etc. 

http://www.instructables.com/id/CNC-Laser-Cutter-Journey/

Aqui, poupam-se a ter de fazer um par de Rodas dentadas, para transmitir uma rotação a 90º, mas atenção, ao contrário das Engrenagens, este movimento mantém o mesmo sentido de rotação!

Espantoso! 

Cortesia deste Blog, o Nerd 360 graus:

http://ner360graus.blogspot.pt/

Será uma Mola-Pino, ou um Pino-Mola?
O que é de certeza, é uma boa solução para Molas em espaços limitados, e cá vai, cortesia da Traceparts, um Manual grátis sobre como desenharem uma destas:

Download SPIROL's Complimentary Coiled Spring Pins Design Guide. 

SPIROL invented the Coiled Spring Pin and its production technology in 1948. Since that time, the Coiled Spring Pin has proven to be the most versatile spring pin in the industry. More than fasteners, SPIROL Coiled Pins provide flexibility, uniform strength, equal stress distribution, closer diameter tolerances, no interlocking, trouble-free automatic feeding, and they reduce costs. Learn how you can take advantage of Coiled Pins in your assembly!   

http://emailing.traceparts.com/partners/Spirol/2015/151203/Coiled-Spring-Pins-Catalog-eMail_sliced_20Jan2016-2.html

Aqui está o Genuino, um Arduino feito com Intel, e que vem com um Giroscópio e tudo, para Iniiados em Programação e Electrónica, mas é claro que os mais Engenhocas irão utilizar isto para N usos avançados...

NewGenuino 101 board powered by Intel

 

Genuino 101 Development Board powered by Intel

The Genuino 101 Development Board powered by Intel, and developed by Arduino and Intel®, is an educational tool for beginners to electronics and programming. The more experienced among you can also use the board to prototype IoT designs such as wearables and Smart home/leisure devices. A successor to the Arduino Uno, the Genuino 101 board features extra functionality, notably Bluetooth Low Energy (BLE), a six-axis accelerometer and a gyroscope.  

http://uk.rs-online.com/web/p/processor-microcontroller-development-kits/9139999/

E se acham que podiam fazer uma Impressora 3D melhor, ou mais eficientem, ou sei lá que mais, aprendem aqui como desenhar tal Máquina-Ferramenta:

How to Design a 3D Printer

3DHotpants 

I recently built my own 3D printer with a friend. The process was both challenging and rewarding, and it's awesome to have a 3D printer of my own design. However, I found very little information out there on how to make a 3D printer from scratch on my own.

The goal of this instructable is to help those interested in 3D printing to have a chance to design and build something that is truly their own and providing resources to help organize the process of making a 3D printer. This process mirrors the engineering process very closely, but will also provide useful resources along the way. 

http://www.instructables.com/id/How-to-Design-a-3D-Printer/

Monorail Halbach, Pilhas-maravilha, Modelismo, Grafeno anti-.corrosão, e Lentes impressas em 3D

De volta, e às voltas, com o Arranjo Halbach, imaginei fazer um Arranjo Halbach a partir duma fonte inesgotável de Ímanes, as barras de íman dos Frigoríficos abandonados, que se encontram por aí, deitados fora.

Descubram o Pólo Norte da barra, com uma Bússula, lembrem-se, o Polo Norte dum ìman é o que faz a Bússula virar a ponta Sul:

Desta forma, basta cortar barritas com a mesma largura da espessura dessas barras, que se cria uma fileira sem fim de ímanes de secção quadrada.

Depois, é a rotina de plantar os Ímanes um a um, pôe um, roda o seguinte 90 graus em relação ao anterior, pôe, etc. 

Só na retranca, fiz este "Monorail" para provar o conceito, os ìmanes estão por debaixo do Plástico, mas vocês podem fazer muito melhor...

 Mãos à obra!

Estas Células de Combustível, a Hidrogénio, do tipo de combustível sólido, prometem ser úteis numa data de situações, em vários tamanhos, e é claro que os Engenhocas as vão usar numa data de Protótipos e maquinetas...
Tudo isto, com 20 Anos de duração!

Solid Fuel Type Hydrogen Fuel Cells Deliver High Efficiency and Increased Safety

ROHM, together with Kyoto-based Aquafairy Corp. and Kyoto University, have co-developed compact, lightweight, high-power hydrogen fuel cells designed to power smartphones and other portable devices. These fuel cells overcome the drawbacks of dry cells, lithium-ion cells, and direct methanol fuel cells, significantly reducing weight and increasing output power while providing a higher level of safety, making it possible to provide power in places where AC power is not available or cannot be used.

http://www.designspark.com/content/solid-fuel-type-hydrogen-fuel-cells-deliver-high-efficiency-and-increased-safety

Uma boa fonte de Material difícil de encontrar, como Fibra de Carbono, e toda a espécie de pecinhas, engrenagens, e Engenhocas úteis, são as lojas de Modelismo. Por isso, aqui vai o Link desta, bastante porreira, e dum atendimento impecável, a SVmodelismo:

http://www.svmodelismo.net/







Poder-se-há futuramente proteger o Cobre, e outros Metais, com uma camada de Grafeno que protege contra a Corrosão, isso vai ser impecável, para uma data de fins:

Graphene coating makes copper almost 100 times more corrosion-resistant

By Darren Quick

Following on from news out of the University at Buffalo earlier this year that a graphene varnish could significantly slow the corrosion of steel, researchers from Monash and Rice Universities have used a graphene coating to improve copper’s resistance to corrosion by nearly 100 times. The researchers say such a dramatic extension of the metal’s useful life could result in significant cost savings for a wide range of industries.
Metals are often treated with polymer coatings to help prevent corrosion, but their protective capabilities can be easily compromised by scratches. Although graphene is only one-atom thick and is invisible, not changing the appearance or feel of the metal, it is exceptionally strong and much harder to damage. This gives the material enormous potential for protecting metals even in harsh environments.

http://www.gizmag.com/graphene-metal-corrosion/24434/

A Disney surpreende-nos com esta novidade, Lentes impressas em 3D, por se utilizar um Material com óptimas propriedades ópticas...

Disney Research develops 3D printed optics

Jason Falconer

Researchers at Disney Research Pittsburgh and Carnegie Mellon University are experimenting with 3D printed optics using clear resin. Printed optics can create a variety of effects within 3D-printed objects, from focusing light within printed prisms to channeling light through honeycomb-like "light pipes," which give the effect of individually lit pixels.

   

One of the examples of the new technology uses a mobile projector and internal light pipes to transfer projections through an object, giving a printed toy a pair of animated eyes. An obvious benefit of the technology is the reduction of electronic components. Entire toy lines that would normally require individual LCD or LED displays (and batteries) for animated parts could use light pipes partnered with a single mobile projector to accomplish the same effect.

http://www.gizmag.com/disney-research-3d-printed-optics/24435/

.

O Arranjo Halbach

Eis algo de bacano, de Diego Dandolini Pasini, para explicar o Arranjo de Halbach!

O Arranjo de Hallbach

E quem quizer comprar uma Armação para o Arranjo Halbach, seja o Circular, de 12 Ímanes, ou o Linear, de 5 Ímanes, cortado em Laser, ou em 3D, é só irem a estes lugares:

12 Ímanes, cortado a Laser:

http://www.ponoko.com/make-your-own/toys/halbach-12-magnet-laser-cut-8615

5 Ímanes, cortado a Laser, um conjunto de 4 Armações: 

 http://www.ponoko.com/make-your-own/toys/4-halbach-linear-frames-8618

12 Ímanes, circular, num Objecto impresso em 3D:

Sculpteo:

 http://www.sculpteo.com/en/design/frame-for-the-halbach-12-magnet-array/CU67PDDr

Shapeways:

 

http://www.shapeways.com/model/690608/frame-for-the-halbach-12-magnet-array.html

5 Ímanes, linear, num Objecto impresso em 3D:

Sculpteo:

http://www.sculpteo.com/en/design/linear-5-magnets-halbach-frame/PcG4FdPw

Shapeways:

http://www.shapeways.com/model/701766/06acdcf010431a4e2c65d27633913978

Halbach 12 Ímanes

Para quem tem seguido as minhas aventuras com o Arranjo de Ímanes Halbach, eis novidades, podem comprar uma Armação para os 12 Ímanes, de 10mm, porque já está à venda na Sculpteo, são 4 Euros mais envio.
Até tem engravadas as direcções dos 12 Ímanes, por isso, é só arranjar 12 Ímanes de 10mm, descobrir a sua orientação com uma Bússula, e encaixar os gajos:

Frame for the Halbach 12 Magnet Array  

by edgarinventor

A Plastic frame or the Halbach 12 Magnet Array.
It allows you to  have a much stronger Magnet, that just stacking 12 magnets...
Because this Magnet Cluster concentrates most of it's Magnetic Force on the inside of this ring, see the Magnetic Graph.
This array has engraved the Magnet's orientation, so you only have to buy the Magnets, see their orientation, with a Magnetic Compass, and embed the Magnets.

http://www.sculpteo.com/en/design/frame-for-the-halbach-12-magnet-array/CU67PDDr

Super-Ímanes, 3D Grátis à farta, Lança-bolas pós canitos, e etc

Querem aumentar a força dos vossos Ímanes?

Apenas empilhar Ímanes, não faz o mesmo efeito ESTRONDOSO, que este conjunto de arranjos Halbach, consegue;
Não só concentra a potência de vários Ímanes, como quase toda a Força magnética vai para um lado!

Arranjo Linear;

Vejam o Gráfico de Força Magnética...

Arranjo Radial;

Mais uma vez, o resultado:

Malta da Energia Grátis, dos Motores Bedini, e dos Canhões Gauss, MÃOS À OBRA!

Build a Halbach Array

And a one-sided refrigerator Magnet!

The late Klaus Halbach of Lawrence Livermore National Laboratories discovered an interesting permanent magnet configuration that concentrates magnetic flux on one side of the array and cancels it on the other. He originally designed it for focusing the beams of particle accelerators. LLNL scientists Post and Ryutov developed the idea into a model Maglev train, the only one so far that uses permanent magnets--it floats over a series of short-circuited coils at only 5 mph or so (the 'Inductrack' system). Maglev trains, motors and generators using circular Halbach arrays have already been patented--the advantages include minimized drag from eddy current effects (drag decreases as speed increases), reduced power consumption (no giant electromagnets needed), reduced exposure of train passengers to high magnetic fields, and other things that we haven't even begin to explore yet.
Our only result from experimentation so far has been a one-sided refrigerator magnet. Though it seems trivial at first, this magnet array seems frighteningly close to a magnetic monopole...it was enough to freak out the entire Wondermagnet.com staff!
http://www.wondermagnet.com/halbach.html#links

...Claro que eu TINHA de fazer a experiência! MUÁHÁHÁ!
Notem o barulho e a velocidade da atracção, dum lado, e a fraca atracção do outro!

Objectos 3D Grátis... É bom!

Já vos falei dum Site, que vos oferece mais de 30.000, mas aqui, são quase 60 Sites. e digo QUASE, porque à mistura, vão 2 ou 3 sites onde pagam, mas o resto é grátis, MESMO.

60 Excellent Free 3D Model Websites

By Kay Tan

3D models represent a 3D object using a collection of points in 3D space, connected by various geometric entities. A free 3D model definitely can save your budget and deadline. On average, a modeler saves over 2 hours of modeling time when they could get a free 3D model. 

http://www.hongkiat.com/blog/60-excellent-free-3d-model-websites/ 

O que é certo, é que os vossos Cães, e até alguns Gatos mais façanhudos, eles cansam-se de brincar a apanhar a bola, muito depois de vocês se cansarem...

Bem, com esta Gigajoga, é só comprar uma Bola, juntar os Materiais, e assim, divertem-se todos, porque é só escolher um Parque mesmo grande, e vai de lançar a bola a 50 Metros de distância, de cada vez!

MAKE A SPRING-ACTION MORTAR WITH ADJUSTABLE HEIGHT (using a plastic beer jar and discarded stuff)

M.C. Langer

A few months ago, I had to help a cousin of mine with a college homework about the physics of parabolic trajectory. He's really good at math, but very bad at crafting. It was my turn to save the day!! I had only one night to build a machine capable of launching an anti-stress ball, with adjustable height. So, I combined a plastic beer jar (marketing stuff from a colombian beer named "Costeña"), a toilet tree for the elevation and other stuff for the frame. It works with two spings, like some type of slingshot. You charge the mortar, lock the trigger, push the trigger and it launch the ball.
LEARNING OBJECTIVE: By building this Spring-Action Mortar, students will be able to build a educational project reusing stuff and analize the physics of launching a projectile with parabolic trajectory.

http://www.instructables.com/id/MAKE-A-SPRING-ACTION-MORTAR-WITH-ADJUSTABLE-HEIGHT/

E depois de demonstrar as trajectórias parabólicas duma maneira divertida, porque não, sacar Imagens de satélite duma forma barata?

Custa pouco, e serve para uma data de coisas, no campo Didáctico, Meteorologia, Astronáutica, etc, e até, apenas pela Imagem...

Tudo isto, com uma Engenhoca de 20 Dólares!

Downloading NOAA satellite images cheaply and easily

sdobbie

This will show you how to download weather satellite images really cheaply and easily using easy to obtain parts.
For this you will need:
RTL SDR USB software defined radio. It costs around 20 pounds.
get it here:http://www.ebay.co.uk/itm/140803976327?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
SDR Sharp. You can search Google for this.

Audacity
APT Decoder
this is a free program.
There are many places to get it

2 metre long piece of wire
long pole to hold the wire
A small laptop computer that you can hold for 15 minutes at a time.

You can connect your radio to a USB extension cable and just hold the radio in your hand rather than having a laptop under your arm. If you do this, the USB cable sometimes causes noise and signal loss so it is best to have the radio plugged directly into the laptop.

http://www.instructables.com/id/Downloading-NOAA-satellite-images-cheaply-and-easi/