Joy Robot ("Robô da Alegria") is a project focused in sharing knowledge and promoting technological innovation to assist NGOs that carry out charitable work in children's hospitals.

The project aims to design a remotely operated robot using open hardware and software technologies, to interact with children using arm movements, face expressions, voice, images, and games.

This design is a 2 inch miniature of the robot, with articulared arms. There are two designs available for download: one with closed helmet and without face (printed from a single file) and another with four parts (body, face, eyes and mouth, and helmet lid).

Conceptual design by: Guilherme Pupo
Detailed design by: Igor Albuquerque

Find more about the project:
https://hackaday.io/project/12873-rob-da-alegria-joy-robot
https://www.hackster.io/igorF2/robo-da-alegria-joy-robot-85e178
https://www.facebook.com/robodaalegria/

How can you help?
We are currently developing and printing the structure of the robot and there are several ways you can help our project:

• Donation: Tip our design if you want to support the construction of the robot and its future improvements. The tips will be used to buy supplies (electronics, 3d printing, filaments, etc.) and to help the promotion of our interventions in children's hospitals. Your name will de added to the credits of the project!

• Like: Show us how much you appreciate our project. Give us a "like" on the platforms we document our project (Facebook, Hackster, Hackaday, Maker Share, Thingiverse...).

• Share: Share the project on your favorite social media website, so that we can reach more people, and inspire more makers around the world.

• Print: We are currently printing a real size version of the robot, and it will take a lot of printing time and material. Contact us if you are interested in helping us by printing some of the parts of the robot, so that we can complete it's structure faster.

• Collect and make your own: collect our design, print it, and share your miniature! You can also donate us your printed miniature, and we will donate it nearby children's hospitals!

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O Robô da Alegria é uma iniciativa de engenheiros, desenvolvedores de software e amantes de tecnologia focada no compartilhamento de conhecimento e promoção de inovação tecnológica para ajudar ONGs que desenvolvem trabalhos de caridade em hospitais infantis.

O projeto visa projetar um robô operado remotamente usando hardware e softwares abertos, para interagir com crianças usando o movimento dos braços, expressões faciais, voz, imagens e jogos.

Esse modelo é uma miniatura do robô de cerca de 5 cm de altura, com braços articulados. Existem dois modelos disponíveis para download: um com capacete fechado e sem rosto (impresso a partir de um único arquivo) e outro composto por quatro partes (corpo, face, olhos e boca e visor do capacete).

Projeto conceitual por: Guilherme Pupo
Detalhamento e modelagem por: Igor Albuquerque

Mais informações sobre o projeto:
https://hackaday.io/project/12873-rob-da-alegria-joy-robot
https://www.hackster.io/igorF2/robo-da-alegria-joy-robot-85e178
https://www.facebook.com/robodaalegria/

Como você pode ajudar?
Nós estamos atualmente desenvolvendo e imprimindo a estrutura do robô em tamanho real e você pode ajudar o nosso projeto de várias formas:

• Tips: faça uma doação para o nosso modelo se deseja ajudar a financiar a construção do robô e nas melhorias futuras. Os recursos arrecadados serão utilizados na compra de materiais (eletrônicos, filamentos para impressão 3D, etc.) e ajudar na organização das intervenções em hospitais infantis. Seu nome será adicionado aos créditos do projeto!

• Like: dê uma curtida nas plataformas onde o nosso projeto é documentado (Facebook, Hackster, Hackaday, Maker Share, Thingiverse, etc.).

• Share: compartilhe o projeto nas suas redes sociais preferidas, para que o nosso projeto possa alcançar mais pessoas e inspirar mais fazedores ao redor do mundo!

• Imprimir: nós estamos atualmente imprimindo uma versão em tamanho real do robô, a qual consumirá bastante material e tempo de impressão. Entre em contato conosco se tiver interesse em ajudar na impressão de algumas peças do robô para que possamos completar a montagem da estrutura mais rapidamente.

• Collect: adicione nosso modelo a sua coleção, imprima e compartilhe a sua miniatura! Você também pode nos enviar a sua miniatura impressa, para que seja doada em hospitais infantis!

Made this modular tool holder to keep my tools (screewdrivers, hex drivers, calipers, pliers, hammer, etc.) organized on my desk.

It was designed to be installed on my office, in a 25 mm gap between two wood pannels, without fasteners. I added a backside hole later, so that the modules might also be wall mounted using some screws (actually I didn't test this method).

Instructions on how it was designed at https://www.instructables.com/id/3D-Printed-Tool-Hanger/
Please vote on my project on Instructables Before and After Contest! :D
https://www.instructables.com/contest/beforeandafter2017/

Got tired of trying to get spinner caps to fit just right. So I made this one that fits itself perfectly every time. Feel free to take it and use it for your design. I've attached the design file. Modeled in Fusion 360.

EDIT 2017-05-05: Uploaded a 22mm diameter version as well as a 22mm diameter taller/thicker version. For the standard 20mm diameter tall version, see the remix by fishtacos: http://www.thingiverse.com/thing:2285212

Here's my 'Mk2' Vertical Axis Wind Turbine (VAWT). I've always liked the lines of these, but they really caught my attention a few weeks ago when I realised that I couldn't explain how they work.

I'm now a lot less confused about how a wing works (really good explanation here if you're interested: http://www.av8n.com/how/htm/airfoils.html), and I've learnt a few new tricks with the printer.

This is my second version and it can generate a much bigger turbine regardless of the printer that's used; it's a lot more efficient with filament too.

At the moment I don't have this driving anything, but the plan is to attach a small water pump (printed of course) to lift water into a gravity feed system.

update: I've added a couple of different blades sizes to suit different build volumes. If you're after something different, have a play with the SCAD file or if that's not your thing, let me know and I can generate some.

update 2: Well it's been up for a while now and I've got a better idea of how it behaves in different winds. It takes a fair bit to get it going and unless it's really blowing it doesn't spin too fast. I think the idea of driving something with it was probably a bit hopeful, but as a sculpture, I still quite like it. The next version will probably have a few more blades and a bigger diameter. All this takes is a few different settings int he scad file, but I haven't gotten around to it yet.

Changes from Mk1
You can find a copy of my first go here http://www.thingiverse.com/thing:940911.

1. The blade profile has changed to a NACA0024 which is apparently better suited to a VAWT than my 'that looks about right' effort;
2. The blades are hollow now. This reduces filament use (obviously) and reduces the weight in the blade which in turn reduces the 'centrifugal' force. This is a big deal as the core of the blade adds very little to its strength, but does increase the force acting on it. The other nice thing about this is that there were lots of tiny delaminations along the tail in the Mk1 which are gone now.
3. The blade is now made up of 'n' sections (3 in this print) which slot together. By splitting it up like this, the blade can really be as long as you like regardless of build area.
4. The first version used pins to align the two halves (didn't work all that well). This version prints a socket on one side of the join that slots into the hollow section of the other piece.
5. The blade is now connected to the central shaft via 'n' struts (again, 3 in this case). One of the big problems with the first one was that the joint (weakest point) was in the middle of the blade where the force is greatest and each half was supported from it's end. This arrangement should be much stronger.
6. By getting rid of the base, the diameter of the windmill can be as long the struts are. Between this and the segmented blades, you can probably make quite a big version if you're keen.

Ideas for Mk3

1. A transverse web across the widest part of the blade; this will improve the strength without adding much weight.
2. Apparently a 'solidity' ratio of 88% (i.e. 88% of the space is taken up by blade) is the optimum for a VAWT. This would mean blade about double the size of this one.
3. I've got an idea for how to make the struts printable with a very strong connection to the blade.

https://youtu.be/jbJLZhv7Xt8