Um Clone de Prusa! E um Escafandro feito em espuma(!), dobrar cartão, uma Empilhadora R/C, e um Gerador de Sinais de RF

Um Clone da Impressora Prusa, e ainda por cima, o mais Económico possível?

É BOM!

Vejam aqui como se faz, e assim, mais gente poderá ter uma Impressora 3D...

Ou, os que já as tèem, podem ter ainda mais! 

LOL

Building the cheapest possible Prusa i3 MK2
Tom

What is the cheapest possible, real 3D printer you can buy without making one compromise after the other? That’s the question we’re asking by building a Prusa i3 MK2-style 3D printer that comes with most of the important features of the original one from Josef Prusa and requires a bit more work for sourcing and building the machine, but most importantly, we’re going to build it only with the most affordable set of parts.
This page will serve as a hub for part lists and build guides as the project moves along! All build videos and the accompanying project videos have been organized into a neat playlist!

https://toms3d.org/2017/02/23/building-cheapest-possible-prusa-i3-mk2/

Por incrível que pareça, podem fazer ISTO, com Placa de Espuma de Plástico, e por isso, é de aproveitar, malta!

Recriação Histórica, Carnavais e Espectáculos, Montras de Lojas, um sem-fim de usos...

Recreating an Antique Divers Helmet From Foam
LostWax

I love the ocean. I can sit on the beach all day just watching the waves do their wavey thing. Sadly, I happen to live in the middle of the Canadian prairies. No ocean to watch here. But there's always the world of make-believe, and what better way to get in the ocean vibe than with an amazing deep sea diver costume. I created this costume pattern to try and recreate the feel of the classic "Mark V" dive helmet which has become an iconic image of divers and the sea. It was used by the U.S. Navy from 1916 until 1984! Let's make one of our own.

https://www.instructables.com/id/Recreating-an-Antique-Divers-Helmet-From-Foam/

Eis mais algo de simplesmente espectacular, na sua simplicidade, uma Ferramenta para dobrar aquele Cartão que podem ter por aí, para uma série de novos usos:

Cardboard Bender
nml235l

A tool is something that makes life easier and more convenient. I have got a rather huge mass of cardboard (a cause of a new furnishings :-)) and appropriate number of ideas to make something with it (Bag for Containers). One problem is bend operations. Cardboard plates have a multiply layer (as usual) so I get clumsy splits during bending. To prevent such behavior I decided to flatten cardboard according the bend line. At this moment we get situation for a ... NEW TOOL. How to make flattening along the path? Certainly, using a one of the ancient inventions – the Wheel. We need only move the wheel (roller) along the path on cardboard surface with giving insignificant pressure. This principle we use in home preservation to connect bank and cover (or let's remember about the roller-machine for road construction). Concept of a tool is very simple: roller (wheel) and handle – nothing more.

https://www.instructables.com/id/Cardboard-Bender/

Este é um projecto que vai ser a alegria de muita gente, ainda mais porque é Open Source, todas as peças e planos à mão, para todos tentarem...

Uma Empilhadora em miniatura, tele-controlada, até a partir dos vossos Smartphones!

Dá para a mandar ir buscar os chinelos, do sofá...

Arduino Forklift

Leon van den Beukel

This is a video about making a remote controlled forklift car. I've used Fusion 360 to design and create the 3D printed parts and CNC machining templates. If you don't have a CNC machine you can also use a jigsaw to cut out the wooden parts. I've provided the cutting templates, sources and 3D printing STL files on my GitHub page:

https://github.com/leonvandenbeukel/F...

https://www.youtube.com/watch?v=_YNgo8A7p8A&feature=youtu.be

Este Gerador de Sinais para Rádio-Frequência, vai fazer a alegria dos Macanudos, aquela malta dos Rádio-Amadores, um equipamento que serve para afinar os vossos emissores:

RF Signal Generator
Milen

The RF signal generator is a must to have tool when playing with radio receivers. It is used to tune a resonant circuits and adjust the gain of different RF stages. Very useful feature of the RF Signal generator is its modulation capability. If it can modulate the frequency amplitude or frequency makes it non replaceable tool for RF design works.
Some time ago I have designed an AM modulator, which could be used for such purposes. It works fine in some cases, but it has the disadvantage to be not able to work as standalone device. It requires additionally power supply module and two signal generators - for the RF carrier frequency and for the modulating signal. This makes it inconvenient to work with it outside the house. I decided to create an RF signal generator working as fully functional stand alone device. Instead to base the architecture on the modern DDS chip, I decided to use the analog approach. As a basis I have chose an existing RF signal generator published here. Similar design is described also here. The credits for this design go to their authors. I repeated mainly the first design adding additional digital frequency counter instead the not very precisely radial scale analog calibration.

https://www.instructables.com/id/RF-Signal-Generator/

 

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."

http://www.foxnews.com/world/2010/07/21/obese-outer-space-scientists-discover-massive-star-born-times-heavy-sun/

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

Estações de Rádio

Estações de Rádio instaláveis quando necessário, eis outra boa idéia:

newbox.TV

Veio deste Site.

http://www.modtech-corp.com/?page=sipsbda800

Também produzem isto Estações de Energia Escaláveis:




.