Torcer a 90º! E uma data de engrenagens, Radio WiFi, e um pantógrafo para fresa

Algo para espantar os amigos e família, uma engranagem a 90º, mas sem dentes! 

sim, há maneiras de criar engrenagens sem rodas dentadas...

Twisty Toy

 rschoenm

I designed this simple twisty toy based on an epicyclic bar angular transmission. It's a cool little fidget toy that looks like it shouldn't turn. Works well as a stress reliever!

You can make this toy with either a wood lathe, or a 3d printer, or a laser cutter.

Supplies:

Hardwood like maple and cherry

1/8" brass rod

3/8" dowel

CA glue, wood glue

https://www.instructables.com/Twisty-Toy/

Ora aqui está um curioso projecto para ouvir Rádio do WiFi, para a vossa criançada, que ainda não têem idade para acessar o Spotify:

RFID Internet Radio
tars.vanhoof 

Hello fellow makers,

This Instructable describes how I made an RFID internet radio for my kids. They like to listen to music but since they're too young to start Spotify and cast to the TV themselves, I decided to make an easy and hopefully fun interface for them. This was a Covid-19 project so I took my time.

The player is built with a Raspberry Pi, a HiFi module and an RFID module. The tags are put in a base on which wooden puppets are glued which are easily identifiable for the kids as containing a certain playlist. I also designed and built a nice enclosure because it will be visible in our living room and therefore it has to look good.

I made a lot of personal choices during the development but because it's built around a Raspberry pi it's very customizable. I'll try to describe my progress and all the problems I encountered as detailed as possible.

I've already got a few upgrades in mind such as removing the (need for) buttons to make it even simpler, I'd like even better full-range speakers, playlist programming via a smartphone, maybe in the long run easier set-up of WiFi and Spotify for non-Raspberry-savvy family members...

I'd love to see what others make of it! Can you guess which song the puppet on top is for?

https://www.instructables.com/RFID-Internet-Radio/

Uma enorme quantidade de engrenagens e rodas dentadas!

É preciso dizer mais?

Gears 

Fred Peyerl

https://www.pinterest.pt/fredpeyerl/gears/

E para terminar, um Pantógrafo para Fresa 3D

The Pantograph Welder 

MegaLoceros 3D

https://www.pinterest.pt/pin/806003664562273251/

Um Pantógrafo 3D, Formlabs e Metal, e Metal em casa

Eis, da lavra de Mathias Wandel, um Pantógrafo 3D, que podem usar para reproduzirem em 3D, uma peça ou outro objecto qualquer:

Building the 3-D pantograph

Building the 3d router pantograph, from start to finish. 

https://www.youtube.com/watch?v=vtm4u583YOQ

Dica da Make, a Formlabs, a Máquina de estéreo-litografia de topo-de-mesa, e acessível, oferece-vos agora, com um novo Material a possibilidade de fazerem Moldes para Fundição por Investimento, que desaparecem, deixando o Metal que ocupa o espaço desses Moldes, o que equivale a dizer que podem imprimir, indirectamente, em Metal!

Ese Material, e um Flexível, que vai servir para os vossos objectos de outra forma, feitos em borracha:

Formlabs Releases Functional Resins: Flexible and Castable 

 Caleb Kraft

Formlabs, the maker of the Form 1+ SLA 3D printer, announced today that they’re releasing a series of “functional resins”. Before, you only had the option of a few colors, but now you can use a resin that is purpose built to be investment cast, or one that is flexible.

http://makezine.com/2014/10/22/formlabs-releases-functional-resins-flexible-and-castable/

...E para uma versão mais maneirinha do mesmo, eis um Instructable que vos ensina a fazer esta interessante Gigajoga para peças pequenas, em Metal de baixo ponto de fusão:

3D Printing with metals at home! 

madaeon

This is a short tutorial that shows you how you can make metal parts, at home, in less than 1 hour, in a few easy steps.

If you like this instructable you can support me having a look at my IndieGoGo campaign here; you can now get your LumiPocket 3D Printer, a project that I started one year ago as a simple hobbyist, and now has became (hopefully) my full time job.

Safety is important!

Casting metal is serious business, and very dangerous. Even when using proper safety gear, and observing all necessary precautions, serious accidents can still occur. Lack of proper safety gear, unsafe surroundings, or unsafe procedure increase both the likelihood and severity of accidents.

http://www.instructables.com/id/3D-Printing-with-metals-at-home/