LED Matrix Mask Will Scare Up Holiday Cheer

December 24, 2013 by Kristina Panos 6 Comments

[Davide] sent us this fun LED matrix mask he built using an ATMega8 and 74LS595N shift registers. Each of the eyes is an 8×8 LED matrix, and the mouth is made from two 8x8s. [Davide] used a ULN2803A Darlington transistor array to drive the matrices.

When the user steps behind the mask, an IR sensor detects that a face is within range and activates the facial features. The code randomly runs the eye and mouth patterns. If the user starts speaking, a microphone element detects his voice and a separate speaking mouth pattern is executed.

The mask body and stand are découpaged with pages from Dylan Dog comics. [Davide] says he built the mask years ago, but decided to submit it to the 2013 Inverart Art Fair in Milan. As you can probably imagine, the mask has been a big hit with the kids so far. Stick around to see [Davide]’s Santa-fied demonstration after the jump. [Davide] didn’t give us any details on that sweet hat, unfortunately.

If you require a better degree of protection or more LEDs, check out this LED helmet.

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Fubarino Contest: A Sculpted Room With LEDs

December 24, 2013 by Brian Benchoff 7 Comments

[Sisam] and [Mclien] are a father and son team that built this sculptural room with an organic looking built-in seating area and sculpted lamp shades. When you have a room that looks this cool, the only option you have is to fill it with RGB LEDs, and it just so happens their light controller has a great Hackaday Easter egg.

The room lighting is provided by a Shifty VU shield, OctoBar LED controller, and a few of these RGB LED modules. All pretty standard for an RGB LED project, but where this contest submission really shines is the controller for all the room lights. It has three sliders for the red, green, and blue channels, beefy toggle switches for each light location, an LCD for showing the program mode, a rotary switch, and push buttons for cycling through stored setups.

The Easter egg for this project comes into play whenever the color value of the lights is set to Hackaday green, #00c100. When that happens, the Hackaday URL is displayed on the controller’s display.

Awesome work, and a really cool-looking room. We wouldn’t mind a tutorial on how you sculpted it, [Sisam].

This is an entry in the Fubarino Contest for a chance at one of the 20 Fubarino SD boards which Microchip has put up as prizes!

An Even Larger Array Of Many LEDs And No Ping-Pong balls

December 20, 2013 by Adam Fabio 6 Comments

Color Led Matrix

[George] has gone pro with his latest RGB LED panel. We’ve chronicled [George’s] journey toward the elusive land of LED nirvana for a couple of years now. He started with an 8×8 rainbow board of many ping-pong balls. When that wasn’t enough, he upped the ante to a 32×16 array of ping-pong balls. Still not satisfied, [George] has now increased the size to two 20×15 panels, for a total of 600 LEDs. While this is only a modest size increase from the previous incarnation, the major changes here have been in the design and construction of the array.

[George] found himself using his LED panels in some professional settings. The stresses of moving and rigging the panels revealed several design weaknesses. The point to point discrete LED design tended to short, leading to troubleshooting by poking at wires in a dark club. The control code was also a mixed bag of solderlab’s code, [George’s] code, and various scripts. Even the trademark ping-pong ball light diffusers were a problem, as they created a fire hazard. [George] took all the lessons from the first and second LED arrays and started a new design – the MX3. The panel frames were constructed by a professional metal shop. Starting with a square steel tube backbone, and aluminum panel shell was welded into place. The steel tube provides a hardpoint mount for any number of rigging options. The front panels are medium-density fibreboard, treated with a fire-retardant paint.

The electronics have also changed. Gone are the individual RGB LEDs. [George] has switched over to the common WS2812 LED strings. Panel mounted Raspberry Pis control the LED strings. Communication is via Art-Net, an Ethernet implementation of the common DMX512 protocol commonly used in stage lighting. The final result looks great. We’re impressed with how much [George] has accomplished at such a young age (He was 16 last June).

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Addressable RGB LED Coffee Table

December 19, 2013 by James Hobson 13 Comments

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[Alexander] has just put the finishing touches on his Addressable RGB LED Coffee Table and it looks amazing!

Making use of his local hackerspace, Sector67 in Madison, Wisconsin, he learned how to use woodworking equipment to build the table out of nice curly maple wood sheet.

Next up he purchased two 4’x8′ pieces of 2.8mm bamboo plywood — even had to rent a U-Haul just to get it back to the space. Talk about dedication to a project! Having never used a laser cutter before either, [Alexander] was quickly fed up with the crappy laser interface software, so instead, he hand wrote the shapes as SVGs in notepad and then converted them to DXFs. That sounds like a rather slow way to do it, but he thinks it ended up being quicker since it’s all straight lines. Two hours of laser time later, and he had a series of slotted strips to create the grid for the LEDs.

To really light up his project, he’s using nice big 12mm RGB LEDs that he’s ordered off of eBay — they came in four strands of 50 which made it super easy to wire. A beefy 5V 12A PSU provides the juice, and an Arduino takes care of the addressing. He’s even hidden the main power cord through one of the legs!

It’s a gorgeous build, and an impressive project for being a first-timer on most of the equipment used. See for yourself in the short video after the break.

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Touching Conversations: Email Snippets Scroll By On Electro-Embroidery Piece

December 19, 2013 by Kristina Panos 6 Comments

[Wei Chieh Shih] really moves the needle when it comes to wearable technology. His textile design project entitled I Am Very Happy I Hope You Are Too is a striking marriage of masterful hand embroidery, delicate circuitry, and careful programming.

[Wei] is using an Arduino micro to drive a matrix of surface-mount LEDs in the Hello, World video, which is a ramp-up to the scrolling text version that’s ~~in progress~~ now finished. That full version is part of his residency project at Arquetopia in Oaxaca, Mexico and displays snippets of emails from his past relationships. It’s huge, with multiple matrices as large as 8×25 pixels!

No build notes could be found for this or any of [Wei]’s similar projects, like this awesomely dangerous 200 laser diode jacket or this eerily beautiful light installation on Taiwan’s north beach. Based on the pictures, our speculation is that he is using ordinary 6-strand embroidery floss to make stem or half cross-stitches on all the paths. He then runs very thin, flexible conductor underneath the channel of stitches and solders the wires to the component pads.

If [Wei] wants another way to wear his heart on his sleeve, he could investigate these dynamic LED clothing hacks.

Update: [Wei] has completed this project, and has more information available at his Behance site.

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Fubarino Contest: Morse Code Christmas Baubles

December 18, 2013 by Mike Szczys No comments

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Fubarino Contest entries are starting to roll in at a faster rate. If you’re working on one you only have a few hours left! Submissions are due before 12:00am Pacific Time! This bit of inspiration is a two-fer. Both entries decided to use Morse Code to spell out the Hackaday URL.

First up, [Tariq] is getting into electronic design because his friend’s 8-year-old son [Yago] is really interested in Math and Science. The device he was working on is a little portable Morse Code message flasher (don’t miss part 2). The idea is that [Yago] can carry it around and pretend it’s a spy device containing a secret message. It might as well be since your average Joe probably wouldn’t notice the irregular flashing and if they did they wouldn’t be able to decode it without some help. The device is built around an ATtiny85. Normally it displays a Christmas greeting for [Yago]. But at the end of the cycle, or at power-up, it flashes the Hackaday URL at an extreme rate. Can anyone actually decode this without putting it on a logic analyzer?

The second offering is in the form of a blinky Christmas tree. [Jim] built the Arduino-compatible ornament for the holidays. It does a great job of flashing a bunch of different patterns, and it wasn’t too much work for him to make it flash the URL.

This is an entry in the Fubarino Contest. Submit your entry before 12/19/13 for a chance at one of the 20 Fubarino SD boards which Microchip has put up as prizes!

Arduino Xmas Tree Shield

December 18, 2013 by Kevin Darrah 12 Comments

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Nothing reminds us that it’s the holiday season more than an LED Christmas Tree submission. This obviously is not the first of its kind, but [Jose] does offer up a new technique using addressable RGB LEDs.

[Jose] decided to use 20 WS2812B RGB LEDs, which if you haven’t seen before, are RGB LEDs with an integrated controller. Yep, that’s right, just power/ground and 1 data line is all that is needed to control hundreds of RGB LEDs. This LED tree’s design is simple: a custom-etched PCB cut it in to the shape of a Christmas tree. The WS2812B LEDs helped keep everything clean, so the tree lacks any ‘ugly’ ornaments, except for the required bypass cap here and there. For an added bonus, the tree’s LEDs are synchronized to music generated by an Arduino via a piezo buzzer. Why is it a shield? Well, the whole tree plugs in nicely to a standard Arduino interface. This looks like the perfect starter project to familiarize yourself with addressable LEDs, or at least to get you warmed up before building your own infinity portal.

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