CNC à Medida! E 3D a cores acessível, a nova Ultimaker, Imprimir à prova de àgua, e um Filtro HEPA

Isto é um autêntico self-service da CNC!

Partindo desta máquina, podem criar uma Máquina CNC À MEDIDA!

O que quer dizer, uma Impressora 3D, Fresa 3D, Sensor, e o que mais queiram.  

E não só isso, mas PODEM FAZER A MÀQUINA À MEDIDA, desde este tamanho gigante, à medida exacta da vossa Bancada de Trabalho.

Maravilha.

Custom additive manufacturing machine
Francois Giguere

DESCRIPTION:
3-Axis Linear Robot that can be used for inspection, CNC routing, 3D printing and more. The robot features a double-driven synchronous drive on the X axis for optimal smoothness and speed. The Z-axis is equipped with a powerful and precise ball screw driven actuator.

https://www.vention.io/designs/6747

Já a HP pensa numa Impressora 3D a cores.

Mas não a ESTE preço, 399 dólares!

E não se esqueçam:

4 bobinas, não significa só 4 cores, mas também 4 tipos diferentes de Filamento, que se podem fundir.

I'd add to the great Article below... 

It not allows for 4 color printing, but remember, 4 different types of Filament. Yup, Multi-material, and possible material Fusion.

M3D Launches Full-Color Palette 3D Printer “Crane Quad”
Hanna Watkin

M3D, the American 3D printer manufacturer, is launching a new desktop printer called Crane Quad for under $500. It offers more than 50,000 colors with its full-color palette. This is one of three 3D printers in the new Crane series. Touted as a world first, M3D is launching a full-color 3D printer which they also claim brings a “new era of color 3D printing.” The Crane Quad 3D printer is a new desktop machine from US-based manufacturer, M3D. It promises 50,000 colors, a build volume of 214 x 214 x 230mm, and a full-color palette. Therefore, it is a multi-material 3D printer which can also produce multi-colored objects. To make the printer even more desirable, the starting price is $399. The new printer offers a “QuadFusion” 3D print head, enabling it to print and blend four filaments of most colors and material types, so long as they’re 1.75mm. The direct-drive extruder has four motors, three fans, and a 0.35 mm mixing nozzle.

https://all3dp.com/m3d-launches-full-color-palette-3d-printer-crane-quad 

A nova Ultimaker, maior, e melhor...

New Ultimaker S5 3D Printer: Ultimaker Goes Bigger and Better
Tyler Koslow

Originally founded in 2011, the Dutch 3D printer manufacturer Ultimaker has solidified itself as a pioneer in the open source 3D printing community. With a highly praised range of professional-grade 3D printers and one of the most popular 3D printing slicers in Cura, there’s no doubt that Ultimaker is one of the most influential players in the desktop 3D printing market.
In 2016, the company released the Ultimaker 3, a groundbreaking dual extrusion 3D printer that many still consider to be the best that money can buy. Today, at the manufacturing tech trade show Hannover Messe 2018, Ultimaker unveiled the new Ultimaker S5 3D printer, a bigger and better version of the beloved Ultimaker 3.

https://all3dp.com/1/ultimaker-s5-3d-printer-review/

Uma boa fonte de frustração, é imprimir um Objecto que supostamente deveria conter àgua...

E ele nem contém AR!

Para evitar isso, sigam o Instructable indicado abaixo:

Weekend Project: How to 3D Print Watertight and Airtight Containers
Tyler Koslow

A new Instructables post from user mikey77 shows how you can adjust your 3D printing slicer settings to make watertight and airtight containers, cups, tanks, and more.
There are tons of useful and unique objects that you can create with your desktop 3D printer, but there are certain factors that prevent makers from properly producing food-safe and watertight items. Generally speaking, the layering of FDM prints lead to micro spaces that allow bacteria to build up, water to leak, and air to seep out.
But a new Instructables post from user mikey77 claims that with just a few tweaks to your 3D printing slicer settings, you can 3D print containers, cups, and tanks that are watertight and airtight. The concept is simple. All you need to do adjust your slicer to prompt over-extrusion of your filament.

https://all3dp.com/weekend-project-how-to-3d-print-watertight-and-airtight-containers/

Imprimir em ABS é um risco, devido ao cheirete que aquilo produz, e porque esse fumo contém uma boa dose de toxinas, que não interessam a ninguém...
Entra em acção este Instructable, mesmo a pensar nisso:

Active Air Filter (HEPA 13 Filter and Active Carbon Pellets)
Deep silence

I initially made this filter to remove the toxic volatile organic compounds and fine particles generated by my 3D printer. It can be, of course, used for other purposes, like filtering the air of a room; just keep in mind it is designed to continuously filter air, not to clean heavy fumes at once.The HEPA filter catches the particules, while the active carbon removes odors.
The box is about 11x11x20 cm big, and contains a HEPA 13 filter and active carbon pellets. The filter is actually a vacuum cleaner filter which seem to be standard, or at least easily findable, and the active carbon pellets can be bought from any aquarium seller, or others.
I mounted a 12V fan, and preferred a silent fan over a powerful one, but you can make different choices. There is a door on the exhaust pipe, used to redirect some of the filtered air back into the printer enclosure (thus keeping a correct temperature inside), which is not mandatory (actually, the exhaust pipe is not mandatory either).
It is difficult to test the filter efficiency without proper tools; at least, the smell inside the printer enclosure is much lighter now that I use this filter...

http://www.instructables.com/id/Active-Air-Filter-HEPA-13-Filter-and-Active-Carbon/

Servo-Motores para todos! E um Sintetizador de mistura, Filamento de Borracha, aprendam OpenScad, e reparar Ficheiros 3D!

Qualquer motorzinho pode agora ser um Servo-Motor?

Com FEEDBACK?

E  com uso para motores lineares, e motores de todo o tamanho?

Uma muito boa Notícia...

New products: Jrk G2 USB Motor Controllers with Feedback
Jan

After many months or years of work (depending on how you look at it), I am happy to introduce our newest motor controllers, the Jrk G2 USB Motor Controllers with Feedback, which we are releasing today in four power variants:

	Jrk G2 18v19	Jrk G2 24v13	Jrk G2 18v27	Jrk G2 24v21
Recommended max operating voltage:	24 V(1)	34 V(2)	24 V(1)	34 V(2)
Max nominal battery voltage:	18 V	28 V	18 V	28 V
Max continuous current (no additional cooling):	19 A	13 A	27 A	21 A
Dimensions:	1.4″ × 1.2″		1.7″ × 1.2″

The main purpose of the Jrk G2 family is to enable feedback-based control of DC brushed motors, simplifying closed-loop control of things like the position of an actuator. An example that is probably familiar to most of us is the common hobby servo that has an output shaft that can rotate to various positions as commanded over a simple interface. The Jrk motor controllers can be used for giant versions of those servos, and they can also be used in many other systems as long as you can somehow get feedback in the form of an analog voltage or a frequency. Analog voltage feedback is often easy to get from potentiometers that can serve as angle or position sensors.

https://www.pololu.com/blog/763/new-products-jrk-g2-usb-motor-controllers-with-feedback

Um Sintetizador que mistura amostras de som até 4 delas, e em várias percentagens das mesmas, é o que podem construír com um Raspberry Py, neste Projecto:

Building the Google Open Nsynth Super
Andrew Back

A Raspberry Pi and machine learning powered instrument for generating new unique sounds that exist between different sounds.
NSynth (Neural Synthesizer) is a machine learning or “AI” algorithm from Google and collaborators that uses a deep neural network to learn the characteristics of sounds, and then to create a completely new sound based on these. More than simply mixing sounds it actually creates an entirely new sound using the acoustic qualities of the original sounds.
Open NSynth Super is an experimental physical interface for NSynth that is based around a Raspberry Pi, custom PCB and a simple laser-cut enclosure. It comes provided with turnkey O/S images that bundle preconfigured software and firmware, along with sets of example sounds — meaning that you don’t have to go through the extremely resource-intensive process of generating audio files in order to start experimenting with the synthesizer.
The PCB design, microcontroller firmware, software and enclosure design are all published under open source licences, meaning that anyone is free to build their own Open NSynth Super.

https://www.rs-online.com/designspark/building-the-google-open-nsynth-super

Mais coisas boas da Hoffman Engeneering, um Filamento de Borracha, que se porta mesmo como Borracha, e tem a aparência de Borracha!

E ainda, uma armação para Ventoínha de arrefecimento, para descarregarem.

 

Filaflex - 3D Printable Rubber!
Hoffman Engineering

I try out some more flexible filament, this time Filaflex by Recreus. I also add a cooling fan, which makes a drastic difference in print quality!

https://www.youtube.com/watch?v=L1wHvG59bms

OpenScad é um poderoso Programa CAD, mas difícil de aprender.

Por isso, aprendam com quem sabe, que aqui vai um Tutorial:

OpenSCAD Tutorial for Beginners (5 Easy Steps)
Michael Jones


OpenSCAD is a powerful, free and open source modelling tool that lets you make precise 3D models with just a few lines of code. With the right setup, you can even make adaptable, "parametric" models. In this OpenSCAD tutorial, we'll get acquainted with the software, review a simple example and then discuss how to make parametric designs.

https://all3dp.com/2/openscad-tutorial-for-beginners-5-easy-steps/

É duro, ver um Objecto que idealizaram ser mal-impresso como num Pesadelo!

E se a culpa, não é da Máquina, mas do objecto, eis como podem reparar o ficheiro 3D, para ser transformado num Objecto Imprimível:

How to Repair STL Files with 3 Free STL Repair Software Tools
Dibya Chakravorty

Nothing is more frustrating than a 3D model that won’t print. STL files need to be watertight, have the right wall thickness and be properly optimized in order to be printable. Even the most experienced 3D designer will sometimes leave unprintable defects in the model. So you need software to repair your STL files.
If you have a broken STL file, your Slicer software will often warn you about the defects. But in the worst case, the slicer won’t complain at all. You will start printing as usual, spend time and money, and eventually land up with a failed print.
Another common scenario is when you try to upload an STL file in an online 3D printing service like i.materialize or Sculpteo, but get an error message saying that the file size is too big. In this case, you are dealing with a bloated STL file.
So what do you do in these situations? How do you repair STL files to get a printable version?
In this article, we introduce you to the best free software that can check your STL file for errors and also repair STL files automatically to produce a printable version.

 https://all3dp.com/1/best-free-str-repair-software-tutorial-netfabb-microsoft-3d-builder/

DesignSpark brilha! E um micro-relé, uma Prensa Hidráulica reversível, Um Gato-mealheiro 3D, e Projectos prá Criançada!!

Hoffman Engineering, é uma página do Youtube onde se podem passar horas a ver coisas incríveis...

Das quais destaco, apenas a nível de exemplo, esta análise do DesignSpark Mechanical, onde eles descobriram as capacidades mais incríveis, para um Programa grátis, ainda por cima!

Por exemplo, embaixo, na imagem, está uma criação radial, em que uma peça individual é repetida à volta dum cilindro, e tudo intuitivo, e tudo fluído, um espectáculo!

The Best Free CAD Program - DesignSpark Mechanical
Hoffman Engineering

his is DesignSpark Mechanical, and it is the best free CAD program that I have personally used. Many of the free CAD alternatives are clunky and hard to use, DesignSpark is the first one that truly impressed me. So download it, and give it a try!

https://www.youtube.com/watch?v=ZXgMY3-hlgs

Já que têem uma Impressora 3D, porque não usá-la para fazerem componentes electro-mecânicos como este Micro-relé?

Vem com o ficheiro 3D necessário para além das explicações, é claro:

3D Printable Robotic Actuator

seanhodgins

Upon research for an upcoming project, I discovered this simple way to make very tiny magnetic actuators. RC enthusiasts have been using these for some time now, but they don't seem very well known. I think there are a lot of useful applications for these little actuators, and they are simple enough to be designed by anyone, which means easy to implement in custom projects. Follow along in the video as I show you how to make the one designed and I will explain how it works. Although I have provided the files to 3D print my design, I encourage you to try and design your own!

https://www.instructables.com/id/3D-Printable-Robotic-Actuator/

Eis uma Prensa Hidráulica que tanto pressiona para baixo...

Como para cima!

Para vários trabalhos diferentes, onde seja necessária uma força exercida numa dessas direcções.

Versatile Press / Brake and More..

Tuomas Soikkeli

Hi!
This is my instructable about making a press. And some usefull attachments for it.
Instructable includes plans. Structure is tested with 8 ton jack.
With 6 ton jack, frame keeps it shape without any bends.
Welds are made with 3.25mm Esab ok 73.15 welding rod. I used 110 a current.
I made my press with little different way.
Jack is placed down...
It lowers the center of gravity and places the handle at a height where you can bare down instead of pulling down. Its easier to make different attachments to it, for bending, rolling etc.
..Or up.
To get more power for stamping and punching steel.
I made an attachment to mount 8 ton jack to the upper bar.

https://www.instructables.com/id/Press-Brake-and-More/

PODE acontecer que algum Engenhocas exaspere a Patroa com as suas tropelias, como curtos-circuitos, explosões, ou utensílios de cozinha sequestrados, para não falar da sucata, e do lixo acumulado...
Para essas ocasiões, nada melhor que imprimirem este "Renhau" ternurento, que até serve de mealheiro, para fazerem as pazes!
Eu penso em tudo...

SCHRODINKY: BRITISH SHORTHAIR CAT IN A BOX – 3D PRINTABLE, MULTI PART MODEL - SINGLE EXTRUSION PACKAGE

3D model description
Schrodinky: The British Shorthair in a Box 3D Printable Multi Part Model is a larger scale, more detailed and complex version of my original 3D printable "cat in a box" models:

https://cults3d.com/en/3d-model/art/schrodinky-british-shorthair-cat-in-a-box-3d-printable-multi-part-model-single-extrusion-package

E já agora, a Míudagem! 

Já que eles ajudam, a segurar em peças, e o que mais for, e querem fazer alguma coisa, eles mesmos, cá está um sem-fim de coisas fáceis de fazer, que lhes darão o que NENHUM dinheiro lhes dá, Realização pessoal!!!

60+ DIY Kids Crafts You Can Make In Under An Hour
Lauren J

Looking for DIY kids crafts your kids can make in under an hour? If you want some cool craft ideas for the kids to work on, here’s a list that will give you tons of inspiration. From art projects to easy crafts, you won’t run out of things to keep your kids busy.

22 DIY Kids Craft Ideas | Easy Crafts for Kids

Kids should not lose their creativity! With all the technology they have access to nowadays, I feel like it is my role as a mother to keep their creative juices flowing. If you have a child, I’m sure they are either playing their favorite video game or staring at the television all day. So what can we do as moms to keep them busy without technology? Get them into crafting and have them enjoy making cool art projects and stuff with their hands

https://diyprojects.com/diy-kids-crafts-under-hour/

Maslow! E desenhos para 3D, caixas para baterias, Brinquedos de toda a espècie, e Impressão 3D a Cores, MESMO!

Isto é que é  uma maneira incrível de ganhar dinheiro com o vosso Hobby!

Uma Fresa CNC que corta Placas enormes, e sem peças complicadas, e até ocupa menos espaço!

Já imaginaram o que podem fazer, de Caíaques a Mobília, passando por letragem e adereços para lojas?

E é tudo Open Source, pelo que podem até construír tudo em casa....

You are going to build amazing things.

Maslow is a community driven open source project with the goal of making large format CNC technology available to everyone. We believe in a world where people everywhere can collaborate, share, and build amazing things together.

What is the Maslow CNC Machine?

Maslow is a large (4'x8') CNC cutting machine designed to let you cut big, useful things out of wood and other flat materials. Cut out a tiny house, a kayak, a tree house, some furniture, or anything else you can imagine. Maslow is designed to be affordable to buy, cheap to ship, easy to use, and powerful. Because designs can be shared digitally, you can build on the work of others or create your own from scratch. Here is our Kickstarter video which is a little out of date, but explains the projects goals well.

http://www.maslowcnc.com/

Viram um Vídeo, ou uma Imagem, na Net, e querem criar algo no Mundo Real, mesmo a 3D?

Aqui vai este Instructable, deste vosso amigo, há tanto tempo nos Instructables, que lá estou, só com o meu primeiro nome...  

Sim, foi um dos primeiros.

Com o Inkscape, e o FreeCad, ou outros programas equivalentes, podem tratar de tudo, sem mais nada:

2D to 3D, Image to Svg to 3D

Edgar

I've become fascinated with those X-Ray Videos of working Mechanisms, and so, I wanted to make some MDF cut plates of them, just for fun.
So, I went to the Net to search for some 3D Files, but the ones I've found are crap, either Homemade Firearms, or 3D for movies, so I went to do them from scratch.
Here's my tips on how to do it;
How to turn any 2D image, into an Object, or into many parts of a 3D Project.

https://www.instructables.com/id/2D-to-3D-Image-to-Svg-to-3D/

Nas Engenhocas que envolval alguma Electrónica, entram quase sempre as Baterias, e daí que caixas para as mesmas,  e aqui abaixo, têem como construír 4 tipos diferentes delas!
Claro que estas caixas podem alojar toda a Circuiteria...

Battery Cases for Electronic Kits.

liquidhandwash

If you have built one of the cheap electronic kits featured in my previous instructable, you probably want to put in some sort of case. Having your project in a nice looking case will really make your project look great and will impress your friends much more than a naked PCB with wires and a battery hanging off it. Your project should be something you can be proud of, take to a job interview and say look what I made!
This instructable will show you whats possible with a little thought and a laser cutter.
There are four types of cases shown here,

•  Case without a battery or switch: The easiest to make but you will need to run a lead to your power supply.
•  Case with a battery: Great if your kit has a switch.
•  Case with a battery and switch: The most challenging to build, but some kits don't have a switch.
•  Case with a push button, battery and switch.

https://www.instructables.com/id/Battery-Cases-for-Electronic-Kits/

Uma fonte infinita de Ideias, é decerto, o Pinterest.

Para dar apenas um exemplo, Vejam, embaixo, 97(!) Ideias para Brinquedos!

 

97 Examples of Tech-Free Toys

Katherine Pendrill

From DIY Paper Box Puppets to Wooden Coloring Books

While miniature robots and app-controlled playthings may be on the rise, there is still a growing demand from consumers for simple tech-free toys that allow children to embrace their imagination. Made from minimalist materials and featuring straightforwards designs, these timeless toys prove that children don't necessarily need the latest high-tech products.
For boys, there are a number of tech-free toys that are heavily focused on building. For example, there are home-inspired wooden building blocks, cardboard architecture kits and paper-based medieval toys, all of which offer boys the possibility of building their own creations from simple and uncomplicated materials.
For girls, these tech-free toys offer creative and artistic options that go beyond traditional plastic dolls. Some of the most innovative toys for girls are empowering coloring books, DIY paper doll crafts and miniature felt garden play sets. Despite their simplistic design and lack of smart technology, these tech-free toy options for girls are extraordinarily imaginative and highly educational.

https://www.trendhunter.com/slideshow/techfree-toys

E ESSE Link, para um Site interessantíssimo, é apenas UM dos milhentos que aparecem, apenas por inserirem "Toys" na tabela de Busca do Pinterest!
 

"Toys" result, on the search tab of Pinterest result!

It goes on, and on, and on...

https://www.pinterest.pt/pin/329325791495942746/?lp=true




 

E a famosa Marca de Impressoras de papel, HP, aventura-se agora na Impressão 3D, a core, mas mesmo a cores, com as cores que queiram a gradientes, e tudo!

E com qualidade dum produto saído da Fábrica!

É de seguir com atenção...

The amazing science behind HP’s new full-color 3D printers

Garage Staff

Today, HP unveiled its groundbreaking low-cost, full-color 3D printers at the annual SOLIDWORKS World 3D design and manufacturing trade event. The new HP Jet Fusion 300/500 printers are an industry first: capable of creating production-quality prototypes quickly, accurately and affordably — making advanced 3D technology accessible to a wider swath of digital innovators. And this huge leap forward in 3D printing began as HP explored a surprising realm of light — one that we’re unable to see.
Cheryl MacLeod, HP’s Global Head of 3D Fusion Science, leads the team of scientists and engineers at HP’s 3D Open Materials and Applications Lab in Corvallis, Oregon who are charged with developing the science behind the company’s portfolio of 3D printing materials. “We ultimately think of printing as a way to convey information,” says MacLeod. “And with 3D color printing, we now have an entirely new language.”
Breakthrough 1: Seeing the light
In developing the new Jet Fusion technology, HP’s 3D R&D teams called on the company’s deep expertise in the science of ink to create black fusing agents able to absorb heat at greater speeds, as is needed for 3D printing. But printing color with exclusively black agents isn’t possible, so a new solution needed to be found.
The new HP Jet Fusion 300/500 printers are an industry first: capable of creating production-quality prototypes quickly, accurately and affordably.
Courtesy of HP
The new HP Jet Fusion 300/500 printers are an industry first: capable of creating production-quality prototypes quickly, accurately and affordably.
HP’s scientists realized that they needed a primer coat of white on the outer layers of the black parts being produced so that color could be applied and fused. But how could you create a layer of white when all available fusing agents were black? A new kind of fusing agent was needed, so that the surface of the fused part remained white, but absorbed heat as well as black. And they found the answer in an unexpected realm of light — one that we’re unable to see.

https://garage.ext.hp.com/us/en/innovation/3d-printers-hp-jet-fusion.html

Corte Laser, na Impressora 3D! E DLP acessível, Espelhos poderosos, 3D transparente, e soldardeira de bolso!

AVISO

Devido à cada vez maior Censura, muitas vezes descabida, da Facebook, apagarei a página Engenhocas.
E aproveitei para mudar o Link, que era, aparentemente, difícil de decorar. 

TOMEM NOTA DESTE NOVO ENDEREÇO,

https://gizmosandstuff.blogspot.pt/ 

E PASSEM PALAVRA!




Que tal, terem um Laser na Impressora 3D?
Esta é a proposta da Endurance Lasers, que capacita uma simples Impressora 3D a cortar e gravar, fazendo das vossas máquinas, multi-máquinas! 
Vem com um Teste de Calibração do Foco do Laser, e é uma muito boa ideia.
Vejam o Vídeo, abaixo:

Get a discount as Endurance Lasers put metal engraving to the test

Beau Jackson

Endurance Lasers gives makers the ability to upgrade 3D printers, CNC routers and other DIY machines with multi tool functionality. By installing a laser diode, these machines become cutting tools and engravers, capable of writing on acrylic, wood, leather and metal, maximizing workshop productivity.
The lasers can be installed on any 3D printer or CNC machine to extend capabilities.
Read on for an exclusive discount.

The 8.5W+ laser, exclusively available to order from the company’s website, is the second most powerful diode in Endurance Laser’s arsenal. Providing “infinite continuous power,” the 8.5W is capable of writing on all manner of surfaces, from stone and wood to leather and sheet metal.
In a series of Endurance experiments, we see how the 8.5W+ makes short work of matte & hard steel, and glossy & composite aluminum.

https://3dprintingindustry.com/news/get-discount-endurance-lasers-put-metal-engraving-test-131135/

Não hajam dúvidas, a Impressão DLP é o melhor que há, em fidelidade ao Modelo 3D.

Este Modelo, até é melhor que os anteriores, porque em vez dum Laser a andar, usa uma Imagem por camada, e são camadas ínfimas, o que, claro, dá numa fineza de acabamento, de fazer chorar as pedras da calçada... E a menos de 500 Dólares!

Mas, menos de 500 Dólares, também significa um volume máximo de 11,5 x 6,5 x 15,5 Cm, e atenção, há uma cura do Objecto a fazer, e limpezas a executar, porque isto de resinas, é mesmo assim.

Anycubic Photon Review: A DLP 3D Printer For Less Than $500
Anatol Locker

Too good to be true? Not at all! Read our Anycubic Photon DLP 3D printer review and follow us on the journey from unboxing and assembly to the first prints.
As far as low-cost desktop DLP 3D printers go, the new Anycubic Photon DLP 3D Printer has emerged as one of the most appealing options on the market. Anycubic has a reputation for building reliable and affordable printers like the Anycubic i3 Mega FDM 3D printer. When it comes to the price, the Anycubic Photon is no exception – it’s one of the cheapest DLP 3D printers out there.

Don’t miss: 20 Best Resin (SLA/DLP) 3D Printers 2018
We recently got our hands on the Anycubic Photon, and decided to give it a test run. Although this isn’t a full-fledged review, we wanted to document our first experience with this unique 3D printer, as well as the unboxing and assembly process. We will continue to update this review as we get more familiar with this beastly little machine.

The Anycubic Photon DLP 3D printer is generating some serious buzz across the community, and for good reason. Priced right around $450, this machine is a potential game-changer for the SLA/DLP desktop 3D printing sector. But talk is cheap; we wanted to see this 3D printer in action.

https://all3dp.com/1/anycubic-photon-3d-printer-review/

Querem um Espelho para queimar coisas com a luz do Sol?
Muáháháhá!

Mas também pode servir para Telescópios de Reflexão, e o que mais for de Óptica, esta ideia fenomenal, de usar espelhos acessíveis, de Camião, que são convexos, e utilizar A PARTE DETRÁS, removendo a tinta protectora, para obter...

Um espelho Côncavo!
E como nessa parte, não há vidro, a potência de reflexão é ainda maior.
Muito bom. 

How To Make Solar Concentrating Mirrors (super HOT focal point)

NightHawkInLight

In this video I show how to convert inexpensive truck mirrors into powerful first surface solar concentrators. Check out my sponsor Brilliant for a really fun way to learn! https://www.Brilliant.org/NightHawk First surface mirrors are an extremely efficient way of concentrating solar energy, much more efficient for their size than a fresnel lens. This type of mirror is also essential for optical applications. Check out the video about making first surface mirrors over on GreenPowerScience: https://youtu.be/IaEaaeajCSI

https://www.youtube.com/watch?v=cWnykMRKQl0&attr_tag=mFG4pBHyfVXOTmud-6

Isto é muito, muito útil!
Objectos 3D que podem ser tão transparentes, que sirvam de LENTES?
As possiblilidades são infinitas. 
Como tudo está ligado entre si, isto de Lentes, só se produz com Impressão DLP...

Learn How to Make Your 3D Prints Truly Transparent

Pinshape Blog

3D printing continues to advance in its ability to create visually accurate prototypes, but most machines are still unable to produce optically clear parts. In this post, you’ll learn why 3D printers struggle to make objects clear straight off the build platform, and you’ll discover 3 techniques for making optically clear parts.

Why Aren’t 3D Prints Clear?
A smooth lake reflects surrounding objects, but when agitated the image warps and distorts. On a smaller scale, this is the effect that causes 3D prints made in a clear material to appear slightly opaque. Layers of a 3D print take on a slightly oval shape creating small gaps between layers that refract light and distort the image.

The above graphic from Taulman3D shows how light travels and bounces inside the layers of a 3D print. The purpose of the techniques you’ll learn today is to either add or subtract material from the print in order to flatten the layers and allow light to pass through without refraction.

https://pinshape.com/blog/learn-make-3d-prints-truly-transparent/

E para os Fabbers, os Entusiastas da Electrónica, e os Sucateiros de Ocasião, eis uma pequena caixinha para soldarem e des-soldarem em todo o lado...
É bom!

The Back Pocket Soldering Kit
Bean_MD

As a budding electronics enthusiasts, I made alot of things on my farm autonomous. With that came the problem that my soldering skill is a bit dodgy.
Recently I had to repair a few of these dodgy solders, which means I had to disassemble and take the part with me to the workshop.
This is a 10km + drive.
So as it is said, necessity is the mother of invention.
This is my kit I can drop in my back pocket, in my cabby hole, I even have one in my sun visor.

https://www.instructables.com/id/The-Back-Pocket-Soldering-Kit/