Polygonia Helps You Laser Cut Beautiful Patterns

March 8, 2019 by Lewin Day 9 Comments

Lasercutters are amazingly versatile tools that can help you build all manner of complicated structures if you can break them down into a series of planar parts. [David] had spotted artworks at the Smithsonian which caught his eye, using planar shapes with interesting repeating patterns. Wanting to make similar works himself, he set out to create software to help make it possible.

The tool makes it easy to generate complex profiles and export them for lasercutting.

The result of [David]’s work is the Polygonia Design Suite. It’s a tool that aims to make creating geometric patterns for lasercutting easy and simple. The web interface designer has a wide variety of options for drawing shapes and patterns, and the frame size can also be controlled. [David] demonstrates these features with all manner of creations. The project’s Instagram page features basic rectangular panels with inset cubic and triangular motifs, all the way up to an ornate octahedron built from many panels held together with 3D printed clips.

It’s all whipped up in Javascript, handrolled CSS and HTML. Cloud storage and authentication is all handled via Amazon Web Services, which makes handling such features easy. [David] made a special effort to create a separate test site so code experiments won’t effect the live site – crucial for any commercial endeavor.

If you’re in the mood to create some geometric lasercut artworks, check out the tool online. The first 3 exports are free, with a variety of subscription models available for heavy users. We fully expect to see an explosion in fancy lasercut homewares at the weekend markets in years to come.

If your thirst for lasercut art isn’t yet satiated, check out this colorful edgelit acrylic technique.

3D Printing Photos Is Slow But Awesome

March 5, 2019 by Lewin Day 13 Comments

Historically speaking, lithophanes are images made in porcelain with an etching or moulding process, in which an image is visible when backlit due to the varying thickness of the material. Porcelain isn’t the easiest thing to work with, but thankfully for those of us in the present, 3D printers are here to make everything better. [RCLifeOn] has been experimenting with printing lithophanes with great results.

The trick to printing a good lithophane is all in the preparation. It’s important to pick an image that looks good in greyscale, as this is not a process that reproduces color in any way. [RCLifeOn] then discusses the finer points of printer setup to get a nice looking print. Layer heights should be as small as possible to avoid visible vertical bands, and the lithophane should be printed in a vertical orientation, to avoid the print sagging due to a lack of support. Infill is best set to 100%. Most importantly, the printer should avoid crossing the outline of the print to avoid any stringy plastic artifacts spoiling the final product.

It’s a great guide that should help even a 3D printing novice create a great print with the minimum of fuss. A lithophane can make a wonderful gift and is also a good test of a printer’s capabilities, due to the fine detail required. We’ve seen them produced before too, in a wonderful lightbox configuration. Video after the break.

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Hackaday Podcast 008: The Art Episode: Joe Kim, Strings And CRTs, Hydrogen Done 2-Ways

March 1, 2019 by Mike Szczys 1 Comment

We know you love the original art on Hackaday. Those fantastic illustrations are the work of Joe Kim, and he joins us as a guest on this week’s episode to talk about his background, what inspires him, and how he pulls it all off.

This episode is still packed with hacks. Editors Mike Szczys and Elliot Williams somehow stumble into two projects that end up generating hydrogen (despite that not being their purpose). But that art angle this week goes beyond Joe’s guest appearance as we look at a hack to add green curve tracing goodness on a black and white CRT, and an incredible take on a string art building machine. We get a look at interesting hardware that landed on the clearance rack, ultralight robots that move with flex PCB actuators, a throwback to mechanical computing, and giving up control of your home heating and cooling to a Raspberry Pi.

Links for all discussed on the show are found below. As always, join in the comments below as we’ll be watching those as we work on next week’s episode!

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download (60 MB or so.)

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Mayak Turns WiFi Traffic Into Sound

February 27, 2019 by Lewin Day 7 Comments

Dial-up modems were well known for their screeching soundtrack during the connection process. Modern networking eschews audio based communication methods, so we no longer have to deal with such things. However, all is not lost. [::vtol::]’s Mayak installation brings us a new sound, all its own.

The installation consists of four WiFi routers, connected to four LTE modems. These are configured as open hotspots that anyone can connect to. [::vtol::] was careful to select routers that had highly responsive activity LEDs. The activity LEDs are wired to an Arduino, which processes the inputs, using them to trigger various sounds from an attached synthesizer.

As users connect to the routers and go about their business on the Internet, the activity LEDs flash and the synthesizer translates this into an otherworldly soundtrack. The hardware is all hung on a beautiful metal and acrylic frame, which stands as a striking form in the sparse gallery.

The piece creates a very electronic soundscape, but you may prefer your installations to have a more mechanical racket. Video after the break.

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What Happens When You Cross A Brick With A Pixel?

February 22, 2019 by Lewin Day 19 Comments

There are a great many technologies we use to display information every day. We’re all familiar with plasma displays and LCDs, and then there’s more esoteric hardware like the split flap displays on municipal buses and around train stations. However, Breakfast have been working on something that turns architectural features into a display at the same time. Enter Brixels.

The name is a portmanteau of brick and pixel, indicating that each individual brick can be independently addressed as a visual element. A Brixel installation consists of a series of columns, stacked with Brixel elements. Each individual brick on the column contains a stepper motor which can set the rotational position of the brick. The outer appearance of the individual bricks is highly customizable, as the motor hardware is integrated into the column itself. A Linux machine is used as a primary controller, which passes commands to each column’s controller over RS485, and the column controllers then pass instructions to each individual Brixel.

The Brixels are capable of continuous 360 degree rotation and also contain LEDs for various illumination based effects. The largest current installation is the Brixel Mirror, standing at 18 feet wide, 6 feet high, and containing 540 individually addressable Brixels. These are built with one half covered in a mirror finish, and combined with a depth-sensing camera for all kinds of fun interactive effects.

Brixels show that architectural features don’t have to be static – they can become kinetic, living things that can be aesthetically beautiful and also useful. Breakfast are known for their installations which use modern electronics to push the limits in their artistic installations. Their work on high-speed flip dot displays is particularly impressive. Video after the break.

[Thanks to Sheldon for the tip!]

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How To Make Bisected Pine Cones Look Great, Step-by-Step

February 10, 2019 by Donald Papp 8 Comments

[Black Beard Projects] sealed some pine cones in colored resin, then cut them in half and polished them up. The results look great, but what’s really good about this project is that it clearly demonstrates the necessary steps and techniques from beginning to end. He even employs some homemade equipment, to boot.

Briefly, the process is to first bake the pine cones to remove any moisture. Then they get coated in a heat-activated resin for stabilizing, which is a process that infuses and pre-seals the pine cones for better casting results. The prepped pine cones go into molds, clear resin is mixed with coloring and poured in. The resin cures inside a pressure chamber, which helps ensure that it gets into every nook and cranny while also causing any small air bubbles introduced during mixing and pouring to shrink so small that they can’t really be seen. After that is cutting, then sanding and polishing. It’s an excellent overview of the entire process.

The video (which is embedded below) also has an outstanding depth of information in the details section. Not only is there an overview of the process and links to related information, but there’s a complete time-coded index to every action taken in the entire video. Now that’s some attention to detail.

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TréPhonos Calls Up History In Houston

February 8, 2019 by Brian McEvoy 7 Comments

Houston’s historic third ward, aka “The Tre,” is ~~ripe~~ rife with history, and some of that history is digitally preserved and accessible through an art installation in the form of repurposed payphones. We love payphones for obvious reasons and seeing them alive and kicking warms our hearts. Packing them with local history checks even more boxes. Twenty-four people collaborated to rebuild the three phones which can be seen in the video after the break, including three visual artists, three ambassadors, and eighteen residents who put their efforts into making the phones relevant not only to the ward but specifically to the neighborhood. One phone plays sound clips from musicians who lived or still live in the ward, another phone has spoken word stories, and the third has field recordings from significant locations in The Tre.

Each phone is powered by a solar cell and a USB battery pack connected to a Teensy with an audio adapter board, and a 20 watt amplifier. Buttons 1-9 play back recorded messages exclusive to each phone, star will record a message, and zero will play back the user-recorded message. Apps for smart phones are easy for young folks to figure out but the payphones ensure that these time capsules can be appreciated by people of any age, regardless of how tech savvy they are and that is wise as well as attractive. The coin return lever and coin slot also have associated sound clips unlike regular payphones so the artists get extra credit.

Did we say that we love payphones? Yes, yes we did. The very first post on Hackday was for a redbox and that got the ball rolling.

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