Blog Posts

terça-feira, 2 de fevereiro de 2016

Um Torno para Madeira, um Gerador de Engrenagens, uma Onda Mecânica, e uma Mão Biónica!

O melhor trabalho até agora, que eu tenha visto, para transformarem um Engenho de furar num Torno de Madeira sólido e práctico!

Homemade Woodworking Lathe

WoodCrafts 67 

This My Homemade Lathe I made Last year. It consists of An old drill press and Off cuts I had Leftover in the shop. Rails are from An Old louvre door some pine and for the rotating centre I used the bit/ collet end from an old router that was broke. I use this quite often and it still works great. 

Já vos mostrei outros Geradores de Engrenagens, mas este é mais completo, com engrenagens complexas, de rodas dentadas múltiplas:

Gear Generator is a tool for creating involute spur gears and download them in SVG format. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the input/output ratio and rotation speed. Gears can be animated with various speed to demonstrate working mechanism.
Why this tool was created? Just for fun. I'm working on a hobby project, a scale construction machine, which needed some spur gears, and i quickly made a simple spur gear creator script in Javascript with SVG output. As it was done, i couldn't stop, and i added more and more features, and finally i got this tool. It was a pleasure to code the whole thing, i'm a bit sad it is already done, so if you have any idea, what would be a helpful feature, just let me know by sending an e-mail (I couldn't have done this tool without Pageflip, my main project).
Notes about browser compatibility: all new major browsers are supported (i didn't tested IE), but unfortunately Chrome can't render SVG circle correctly. The winners are: Opera for the best performance (shame on me, i never use it) and Firefox for the best looking SVG render. 

Didáctica, simples, mas engenhosa, esta Onda Mecânica mostra-vos como funcionam as ondas, ou seja, o mecanismo ondulantário, e o que ancontece quando a Onda começa no meio, ou nas extremidades, etc:

Mini Wave Model
The Oakland Toy Lab 

A little wave goes a long way!
The mini wave model is small but mighty. With just a few minutes of set-up, it's just as good at demonstrating as its bigger siblings. This is a great model for waves that move, reflect, stand, and wiggle, perfect for a starter project in classrooms learning about waves and motion.
What: Mini Wave Model
Concepts: waves, propagation, physics
Time: ~15 minutes to set up
Cost: ~$1.50
Bolts x 2 (with nuts that fit)
Nuts x 40 (or so)
Sticks (I used candy sticks, but cut dowel or other sticks work great, too)
Block of wood (2x4 works great)
Hot glue gun / hot glue
Hop on the wave! 

Uma ideia que nos faz sentir melhor com a Humanidade, aqui está Ada, uma Mão Protésica, que pode ser feita para qualquer um, em qualquer lado, tudo Open Source, Bravo, Inventores do Grupo Open Bionics! 

Ada Robotic Hand - Open Bionics

Open Bionics 
This is a step by step guide on how to make an Open Bionics Ada robotic hand. This is derived from the Dextrus robotic hand, by the Open Hand Project. It assumes you have either ordered the Ada robotic hand kit or have access to a 3D printer are planning to print 3D parts from YouMagine or thingiverse. The list of required 3D printed parts, components and tools are stated below. If you have ordered the Ada kit, you can skip the first step and start straight from step 2.
This hand would provide an excellent research platform for robotics or a test platform for prosthetics research. It has been designed to be easy to build and repair and should be a great project for someone with interests in robotics or prosthetics and wants their very own robotic hand! 

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