Hanging Glass Speakers Look Super Cool

February 14, 2014 by James Hobson 21 Comments

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Looking for a modern way to spice up your apartment? Well if you’re not too much of an audiophile, these hanging glass speakers look awesome!

First off, we know the question you’re already asking — how do they sound? Well, to be honest, not that bad! You could describe it as being glassy (ha ha), but you would be surprised how nice the bass comes through. The speakers suffer when it comes to treble though as it comes out a bit muffled. This could be corrected with a few strategically placed hidden tweeters though!

So how do they work? Well, like any speaker, the sound comes from vibration — in this case, the glass is vibrated to produce the sound. To achieve this, [Evan] is using a pair of HiWave HIAX32C20-8 tactile transducers, which are actually designed to turn most surfaces into speakers. The tricky part of this build is how to hang them.

Having limited space in his room, [Evan] opted to hang the speakers from the ceiling with wire — the only problem is drilling glass isn’t that easy. He shares a few tips, and eventually succeeded using a Dremel tool. From there it was just a matter of installing some hooks in the ceiling, and stringing it all together.

Check out the following video to hear them in action!

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An Easy Way To Power Flyback Transformers

February 14, 2014 by James Hobson 22 Comments

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Let’s be honest. Playing with high voltage is awesome. Dangerous, but awesome — well, as long as you handle it properly. Flyback transformers are a great way to make a nice big electrical arc, but powering them isn’t that easy — or is it?

First off, for those that may not know, a flyback transformer is the type of transformer most commonly found in old TVs and CRT monitors. They typically can put out anywhere from 10kV to 50kV — the problem is, they aren’t that easy to power. Common methods include using a transistor style driver, or zero voltage switching (ZVS) — which is how [Skyy] cooked some s’mores at 50,000V.

As it turns out there’s another much easier and straight forward method. All you need is a fluorescent light ballast. Use the output on the ballast as the input on the primary winding of the flyback transformer — which can be found using a multimeter, just find the highest resistance between pins to identify it. Now because you’re working with such high voltages, you may want to insulate the flyback transformer by submerging it in mineral oil as to not short it out. That’s it.

Now it’s time to make some sparks.

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An Android Controlled Arduino Drone

February 14, 2014 by Nick Conn 18 Comments

Drone

Who among us has not wanted to create their own drone? [Stefan] wrote in to tell us about a project for high school students, where a Styrofoam glider (translated) is converted into an Android (or PC) controlled drone.

[Stefan] tells us that the inspiration for this project comes from 100 years ago, when “steam-engines were THE thing” and children became introduced to modern technology with toy engines. “Today, mechatronic designs are all around us and this is an attempt to build the equivalent of the toy steam engine.” This project showcases how modern tools make it easy for kids to get involved and excited about hardware hacking, electronics, and software.

At the heart of the glider is an Arduino Pro Mini which communicates with either a computer or an Android phone via Bluetooth. It is especially interesting to note that the student’s used Processing to create the Android app, rather than complicating things by using Eclipse and Android Development Tools (ADT). While the more detailed PDF documentation at the end of the project page is in German, all of the Processingand Arduino code needed to build the project is provided. It would be awesome to see more Bluetooth related projects include a simple Android application; after all, many of us carry computers in our pockets these days, so we might as well put them to good use!

Do you have any well documented projects that introduce young and budding engineers to hardware or software hacking? Let us know in the comment section or send us a tip!

Valentine’s PCBs To Make Your Heart Melt

February 14, 2014 by James Hobson 11 Comments

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Have you ever sat in bed, staring at a bottle of Iron III Chloride, and thought “I should do something with that…”? [Tobias] has. He wanted to use his tinkering skills to make his girlfriend happy, so he decided to make this beautiful etched PCB that professes his love to her.

The cool thing about this project is that [Tobias] has never etched a PCB, or even worked with SMD parts before! After designing the PCB layout on his computer, he printed it out on an inkjet transparency film and applied it to his PCB. After 14 minutes of exposure he then put the board into development fluid for about 60 seconds — it was starting to look good already! He then pulled out his trusty bottle of Iron III Chloride and began the etching process.

Once the board was etched, he soldered 18 red PLCC-2 LEDs in place, each with its own 330Ohm resistor. Not content with a simple on/off switch, [Tobias] decided to program a Trinket with a voltage regulator and mosfet to have it pulse on and off, similar to a beating heart! The finished project looks great, and we’re sure his girlfriend will love it.

Another bonus to doing something geeky like this for your loved ones means it will increase their acceptance of tools laying about, and half-finished projects that aren’t quite as pretty!

Call For Hams And Hackers: Welcome ICE/ISEE-3 Home

February 14, 2014 by Adam Fabio 76 Comments

ISEE-3, one of America’s most dedicated space exploration vessels is on its way home. Unfortunately, when it gets here, no one will be talking to it. NASA decommissioned the equipment needed to communicate with the satellite nearly 15 years ago. [Emily Lakdawalla] at the planetary society has been following the long traveled probe for years. Her recent article on the topic includes the news that NASA essentially gave up the battle before it even started.

Originally named International Sun/Earth Explorer 3 (ISEE-3), the spacecraft was launched atop a Delta rocket on August 12, 1978. Its mission was to study interaction between the Earth’s magnetic field and solar wind. As part of this mission ISEE-3 became the first spacecraft to enter halo orbit. It did this by positioning itself at Lagrangian point L1, directly between the sun and the Earth. In 1982, scientists on earth were preparing for the 1986 flyby of Halley’s Comet. ISEE-3 was repurposed as a comet hunter, and renamed International Cometary Explorer (ICE). The craft flew back to Earth and entered lunar orbit, coming within 120km of the moon’s surface. It used this momentum to achieve a heliocentric orbit, on track for two comet encounters. ICE/ISEE-3 encountered Comet Giacobini-Zinner on September 11, 1985, collecting data and becoming the first spacecraft to fly through a comet’s plasma tail. While not considered part of the Halley Armada, ICE/ISEE-3 took measurements as it passed within 28 million km of Comet Halley’s nucleus. Since then, ICE/ISEE-3 has continued on its 355 day heliocentric orbit. It studied coronal mass ejections in the early 90’s, before being shut down in May of 1997. Follow us past the break to learn ICE/ISEE-3’s fate.

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The 128 Button, 6 Axis, 17 Slider, 4 POV Hat Switch Joystick Controller

February 14, 2014 by Brian Benchoff 56 Comments

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[Paul Stoffregen], creator of the Teensy series of dev boards, previously implemented a six-axis joystick for Teensyduino, the Arduino library for the Teensy. He had originally tried 8 axes, but a few problems cropped up, deadlines approached, and he left it as is. A few recent projects gave him some insight into how to implement a joystick with more than six axes as a USB HID device, so he started looking at how to read an improbable amount of pots and buttons for a USB joystick.

So far, the biggest problem is figuring out what software can actually use an HID joystick with this many controls. The answer to that question is none. The Linux-based jstest-gtk is able to read 6+17 pots, the four hat switches, but only 64 of the 128 buttons. A user on the Teensy forums, [Pointy], has been working on his own joystick test app that works on ~~Linux~~ Windows, but testing the joystick on Windows is an exercise in futility for reasons no one can figure out.

As for why anyone would want a six-axis, 17-slider, 128-button joystick, think about this: with this much control, it would be relatively simple to build the MIDI controller to end all MIDI controllers, or a cockpit simulator for everything from a C172, 737, to a Kerbal interplanetary cruiser. That’s an impressive amount of control, and all from a $20 Teensy dev board.

Further testing of this Teensy joystick is desperately needed, so if you’re able to help out drop a note in the forum thread.

Troubleshooting A Broken Power Supply

February 14, 2014 by James Hobson 36 Comments

How many power bricks have died on you? Have you ever tried to fix them? Sometimes it’s easier to grab another one (they grow on trees right?), but wouldn’t it be nice to save the broken ones from filling up landfills? Depending on the cause of death, it could be a super simple fix!

[Chaim-Leib] recently purchased a powered USB hub that came with a beefy 5v, 4A power supply — it worked great — until 6 months later, when it didn’t. The company sent him a new one, and let him keep the faulty one. Looking for a challenge, [Chaim-Leib] decided to crack it open and see if he could fix it himself.

No burnt caps, no fried diodes, no burn marks anywhere in fact! Luckily he spotted the culprit: One lonely resistor had lifted up from its pad. Having never jostled or dropped the power brick, this failure likely came from some kind of stress formed during original assembly — throw in a bunch of hot and cold thermal changes, and pop goes the solder pad!

It was a simple fix with some solder, and he emailed the company photos of his operation — they’ve promised to send them on to the engineering team to further evaluate the problem.

That was easy.