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quinta-feira, 24 de novembro de 2016

Uma Impressora 3D SLS! E Som do Plasma(!), uma Besta DIY, um Dado de LEDs, um Gerador Van der Graaf, e Esquadria para Juntas

Este jovem Engenghocas está de parabéns, fazendo este Projecto de 1ª, uma Impressora SLS que vai dar que falar...
Boa ideia!

In this Instructable I want to show you how to build a SLS 3D-Printer with a lot of features. I am an 18 years old guy from Germany who wants to understand how SLS-3D-Printers work in depth. I got the inspiration for this project after I saw a laser sintered object from a professionell SLS-machine. It was so detailed and so perfect. However a professionell SLS-machine is very expensive. So I designed, built and tested my own SLS-3D-Printer. It took me three month to develop the printer and I was quite surprised how well it worked. Now I will tell you some spects about the printer

Isto não é para meninos, porque envolve ALTA VOLTAGEM, mas é um Porjecto do caneco, fazer dum Arco de Plasma, um Altifalante...

Advanced Plasma Arc Speaker

Proto G  
Yes, what you hear in that video is only coming from the scorching hot, high voltage plasma arc. It is vibrating the surrounding air similar to a regular speaker but it does so but sending electrons across the spark gap at the same frequency of the music. It's a great conversation starter to keep in your office!
Plasma speakers make amazing tweeters because they can reproduce high frequency sounds better than regular speakers due to the lack of a heavy diaphragm to move. From an audiophiles perspective, plasma tweeters are as good as it gets for high frequency sounds. For low frequency sounds, larger speakers perform much better. 

Tiro-ao-alvo para o Povo! 
Podem exercitar a pontaria, no Quintal, ou no Baldio, com uma Besta feita em PVC, em casa, sem barulheira, nem problemas legais, nem gastar muito. 
È bom.

DIY PVC survival compound crossbowthefrenchmaker  
For this survival ready contest, I will make a compound crossbow in PVC pipe.Why a crossbow? Because when I think to survival equipment present since the beginning of the series The Walking Dead, I see the Daryl's crossbow. And I find it really cool. Silent and precise it is also a good melee weapon if necessary.To make this crossbow, I will use common materials that can be found everywhere, and does not require any electric tools, except to save time, in order to stay in the survival mind.Ready? Watch out for the walkers!Warning! This is not a toy, be careful. Never aim directly at a person or animal.Only walkers.

Um Projecto que é divertido, e ao mesmo tempo, ensina a conceber e a fazer Circuitos Integrados compatíveis com o Arduino, é uma boa aposta para quem quer aprender...

TinyDice: Professional PCBs at home

Emiliano Valencia  
What is the Tiny Dice?
Simply put, TinyDice is just an electronic, Arduino compatible LED die that looks quite neat.
In reality, this project was my attempt at doing things right; making an SMD circuit, a professional quality PCB, a good PCB design, and an effective code, that allows for a very energy efficient project (when not in use, the whole thing consumes less than 0.1 micro amps, yes, less than 1 ten-millionth of an amp!).
What will you learn here?
You will learn how to make high quality, SMD PCBs, from design to use, which consists in; Designing the board, transferring the design into copper clad, etching the copper clad, adding a soldermask, making a solder paste stencil, home reflow soldering, and programming a standalone board. Additionally, you will learn to use and program MSP430 value line microcontrollers from Texas instruments, these can be programmed like an Arduino, but they are very cheap and come in many shapes and sizes, an ideal tool for the average hacker to be able to use.
What will you obtain?
Appart from an incredible skill set, you will obtain a tiny gadget that displays your skills, plus it is a neat little piece of electronics to have and show around. On top of that, you will have a 6 sided die that will help you make decisions, and even win games )you could modify the code to make it be an unfair dice and use it at your favour).
This Instructable is on the Circuits contest, so if you consider it worth it, please vote for it! 

Um Gerador Van der Graaf, é algo de extremamente Geek, a ter em casa, como um Troféu, mesmo...
Por isso, sigam as Instrucções:

How to make a Van De Graaff generator

I've built this Van De Graaff generator for a science coursework and it works pretty well considering it being built in a rush (needa hit that deadline man). With it, I managed to achieve a 1.5cm spark, a happy physics teacher and full marks for my coursework :D. 
All the parts used are easy to find in shops and really cheap. Don't be too intimidated by the looks of it, its not that hard, improvising is key.
It's my first instructables so bear with me and I welcome any suggestions and comments.
All the best!- CCX  

Juntas de Esquadria perfeita, não importa o Ângulo, é o que este Instrumento vos facilita, duma maneira intantânea, poupando-vos tempo e dinheiro:

Angle Divider for Perfect Miters No 2

Phil B  
In January 2016 I did an Instructable on my copy of a Stanley No 30 Angle Divider. This is another version of the Stanley No 30 Angle Divider that looks a little more like the original from 1903. (Search your favorite browser for Stanley No 30 Angle Divider to see images of the original version with a wooden handle.)
But, the chief advantage of this Instructable is a jig for drilling the center pivot hole in the body. That jig makes dead on accuracy almost foolproof. However, this version is also more work with more steps. But, some shortcuts could be taken for those who do not have access to a welder or want to avoid the extra work.
The photo shows this version of the Angle Divider in use to set a power miter saw. The other member of the miter would be set and cut by turning the Angle Divider 180 degrees and adjusting the saw to the other half of the fence. The fence on this saw had a wavy profile. I needed to catch more of the blade because I was cutting some tall baseboard molding, so I added 3/4 inch plywood to the face of the fence. That brought the work out toward the operator and caught more blade. It also gave a flat top surface for the Angle Divider, which resulted in easier and more accurate setting of the saw 

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