Hackaday Links: November 8, 2015

[Burt Rutan] is someone who needs no introduction. Apparently, he likes the look of the Icon A5 and is working on his own version.

Earlier this week, the US Air Force lost a few satellites a minute after launch from Barking Sands in Hawaii. This was the first launch of the three stage, solid fueled SPARK rocket, although earlier versions were used to launch nuclear warheads into space. There are some great Army videos for these nuclear explosions in space, by the way.

[Alexandre] is working on an Arduino compatible board that has an integrated GSM module and WiFi chip. It’s called the Red Dragon, and that means he needs some really good board art. The finished product looks good in Eagle, and something we can’t wait to see back from the board house.

The Chippocolypse! Or however you spell it! TI is declaring a lot of chips EOL, and although this includes a lot of op-amps and other analog ephemera (PDF), the hi-fi community is reeling and a lot of people are stocking up on their favorite amplifiers.

[Jeremy] got tired of plugging jumper wires into a breadboard when programming his ATMega8 (including the ‘168 and ‘328) microcontrollers. The solution? A breadboard backpack that fits right over the IC. All the files are available, and the PCB can be found on Upverter.

In case you haven’t heard, we’re having a Super Conference in San Francisco later this week. Adafruit was kind enough to plug our plug for the con on Ask an Engineer last week.

Halloween Hood Has Hideous LED Gaze

Looking to create fear and dread with your Halloween costume? [Becky Stern] over at Adafruit has you covered, with her tutorial on building a mystical hood with LED eyes, perfect for your next Jawa, Black Mage, or Orko costume.

This creepy-looking creation is based around a Gemma controller driving two NeoPixel Jewels, small circular RGB LED boards. The Gemma drives the boards to slowly fade on and off for the required creepy eye effect, but it would be easy to create other lighting patterns.

Speaking of patterns, the tutorial also includes a sewing pattern for the hood, and plans for a 3D printed battery holder that would make the whole thing very easy to carry. If the eyes aren’t enough, how about adding an LED magic staff to complete your creepy ensemble? Or perhaps some light-up dinosaur spiky plates?

Do you have any good Halloween costume hack plans? Let us know in the comments, and we’ll put together a list of the best closer to the hideous day.

Continue reading “Halloween Hood Has Hideous LED Gaze”

“Arduino Borealis” Combines LEDs and Paint

[Stef Cohen] decided to combine three different artistic mediums for her latest project. Those are painting, electronics, and software. The end goal was to recreate the aurora borealis, also known as the northern lights, in a painting.

The first step was to make the painting. [Stef] began with a shadow box. A shadow box is sort of like a picture frame that is extra deep. A snowy scene was painted directly onto the front side of the glass plate of the shadow box using acrylic paint. [Stef] painted the white, snowy ground along with some pine trees. The sky was left unpainted, in order to allow light to shine through from inside of the shadow box. A sheet of vellum paper was fixed to the inside of the glass pane. This serves to diffuse the light from the LEDs that would eventually be placed inside the box.

Next it was time to install the electronics. [Stef] used an off-the-shelf RGB LED matrix from Adafruit. The matrix is configured with 16 rows of 32 LEDs each. This was controlled with an Arduino Uno. The LED matrix was mounted inside the shadow box, behind the vellum paper. The Arduino code was easily written using Adafruit’s RGB Matrix Panel library.

To get the aurora effect just right, [Stef] used a clever trick. She took real world photographs of the aurora and pixelated them using Photoshop. She could then sample the color of each pixel to ensure that each LED was the appropriate color. Various functions from the Adafruit library were used to digitally paint the aurora into the LED matrix. Some subtle animations were also included to give it an extra kick.

Hackaday Links: July 12, 2015

Adafruit is working on a series of videos that’s basically Sesame Street for electronics. G is for Ground is out, where [Adabot] discovers pipes and lightning rods are connected to ground. Oh, the rhyming. Here’s the rest of the videos so far. We can’t wait for ‘Q is for Reactive Power’.

Think you’re good enough to build an airlock 70 cubic meters in volume that can cycle once every thirty seconds? How about building a 500 mile long steel tube with zero expansion joints across active fault lines? Can you stop a 3 ton vehicle traveling at 700 miles per hour in fifteen seconds? These are the near-impossible engineering challenges demanded of the hyperloop. The fact that no company will pay for this R&D should tell you something, but that doesn’t mean you still can’t contribute.

Calling everyone that isn’t from away. [Paul] lives near Augusta, Maine and can’t find a hackerspace. Augusta is the capital of the state, so there should be a hackerspace nearby. If you’re in the area, go leave a message on his profile.

Last week we found memristors you can buy. A few years ago, [Nyle] found them while hiking. They were crudded up shell casings, and experiments with sulfur and copper produced a memristor-like trace on a curve tracer.

Need a way to organize resistors? Use plastic bags that are the same size as trading cards.

The Arduino is too easy. It must be packaged into a format that is impossible to breadboard. It should be shaped like a banana. Open source? Don’t need that. The pins are incorrectly labelled, and will be different between manufacturing runs.

An Interview With The CEO Of MakerBot

A few days ago, we posed a question to the Hackaday community. If you could ask the CEO of MakerBot a question, what would it be?

It’s an interesting proposition; there is no company serving the maker community – and those of us who refuse to call ourselves part of the maker community – more hated than MakerBot. They’ve patented ideas uploaded to Thingiverse. They’ve turned their back on the open hardware community they grew out of, They’re undercutting their own resellers, and by all accounts, they don’t know how to make a working extruder. MakerBot was the company that would show the world Open Hardware could be successful, but turned into a company that seemed to reject Open Hardware and Open Source more than any other.

Needless to say, the readers of Hackaday responded. Not with actual questions for the MakerBot CEO, mind you, but oh how you responded. This effort by MakerBot was likened to the hail Mary thrown by Radio Shack  a few years ago. We know how that turned out.

Nevertheless, questions were collected, The MakerBot CEO was interviewed by Lady Ada, and a summary compiled. You can check that interview, originally posted on the Adafruit blog, below.

Continue reading “An Interview With The CEO Of MakerBot”

Ask Hackaday (And Adafruit): The New CEO Of MakerBot

Just a few years ago, MakerBot was the darling of the Open Hardware community. Somehow, in the middle of a garage in Brooklyn, a trio of engineers and entrepreneurs became a modern-day Prometheus, capturing a burgeoning technology into a compact, easy to use, and intoxicating product. A media darling was created, a disruptive technology was popularized, and an episode of the Colbert Report was taped.

The phrase ‘meteoric rise’ doesn’t make sense, and since then the reputation of MakerBot has fallen through the floor, crashed through the basement, and is now lodged in one of the higher circles of hell. It’s not surprising; MakerBot took creations from their 3D object hosting site, Thingiverse, and patented them. The once-Open Source line of 3D printers was locked up behind a closed license. The new MakerBot extruder – the Smart Extruder – is so failure prone MakerBot offers a three pack, just so you’ll always have a replacement on hand. False comparisons to Apple abound; Apple contributes to Open Source projects. The only other way for a company to lose the support of the community built around it so quickly would be a name change to Puppy Kickers, LLC.

In the last few months, figurehead CEO of MakerBot [Bre Pettis] was released from contractual obligations, and MakerBot’s parent company, Stratasys, has filled the executive ranks with more traditional business types. It appears PR and Marketing managers have noticed the bile slung at their doorstep, and now MakerBot is reaching out to the community. Their new CEO, [Jonathan Jaglom] specifically requested a hot seat be built at Adafruit for an open discussion and listening meeting. Yes, this means Makerbot is trying to get back on track, winning the hearts and minds of potential customers, and addressing issues Internet forums repeat ad nauseam.

If you’ve ever wanted to ask a CEO how they plan to stop screwing things up, this is your chance. Adafruit is looking for some direction for their interview/listening meeting, and they’re asking the community for the most pressing issues facing the 3D printing community, the Open Source community, and MakerBot the company.

Already on the docket are questions about MakerBot and Open Source, MakerBot’s desire to put DRM in filament, the horrors of the Smart Extruder and the 5th generation MakerBots, problems with Thingiverse, and the general shitty way MakerBot treats its resellers.

This isn’t all Adafruit wants to ask; the gloves are off, nothing is off the table, and they’re looking for questions from the community. What would you like to ask the MakerBot CEO?

Personally, the best interview questions are when the interviewee’s own words are turned around on them. By [Jonathan Jaglom]’s own admission, the barrier to entry for 3D design work has been substantially lowered in the last three years, ostensibly because of incredible advances in Open Source projects. Following this, do MakerBot and Stratasys owe a debt to Open Source projects, and should Stratasys contribute to the rising tide of Open Source development?

That’s just one question. There will, of course, be many more. Leave them down in the comments. “You are not [Tim Cook],” while a valid statement in many respects, is not a question.

Get up, Stand up. With a Little Help from the Mindfulness Bracelet

[Becky Stern] has created the mindfulness bracelet, a wearable which looks great and serves an important purpose. The bracelet buzzes every hour to remind you to stand up and take a break from work, soldering, gaming, or whatever it is you may be doing. The bracelet is made up of interlinked figure 8 shapes of leather, though [Becky] says rubber from a bicycle inner tube works great as well. The final shape reminds us of the link belts sometimes found on lathes or other industrial equipment. The links are the perfect size to slip an Arduino Gemma in, along with a battery and vibrating motor. A NPN transistor, diode, and resistor round out the entire bill of materials for this design. This bracelet is a heck of a lot cheaper than the Apple watch feature which inspired it!

The time interval is set in the code to 1 hour, and can be adjusted by the user. Although the times are stored in milliseconds, the design does use the ATtiny85’s Watchdog Timer (WDT) to conserve power. This means the time can drift up to 30 seconds per hour, which is fine in this application.

Click past the break to see the bracelet in action!

Continue reading “Get up, Stand up. With a Little Help from the Mindfulness Bracelet”