At the end of the month my contract with my current employer (no, not Hackaday) will end. With the interviews starting to line up I therefore thought it’d be a nice opportunity to design the PCB business card you can see in the picture above.
It is made of two PCBs soldered together, the bottom one containing the SMD components while the top one only has holes to let most of them pass through. The design was mainly inspired by the first version we already featured on Hackaday although the microcontroller was changed for the (costly) ATMega32u4 and the top PCB was slightly milled so the LEDs may shine through the FR4. The LEDs are connected in groups of 2 (total of 8 groups) to PWM channels and a hidden flash memory allows the card to be recognized as an external 2MB storage using the LUFA library. All source files may be downloaded on my website.
With Canada day and Independence day fast approaching, some makers are looking towards setting up their own fireworks to shoot off in celebration – sure you could use a match or lighter… or you could crack out your trusty Arduino and a cellphone! (translated)
To ignite the fuse, [Oscar] is using a short length of Nichrome wire which is controlled via a Mosfet by the Arduino. To control the Arduino he’s using ArduDroid with a Bluetooth module. The app lets you trigger the various digital and analog outputs, and send and receive data.
Stick around to see a few different demonstration videos of the circuit, testing, and launching some little bottle rockets!
Continue reading “Triggering Remote Fireworks with an Arduino and an Android”
Hello people, look at your keyboard, now back to this one, now back to your keyboard, now back to us. Sadly, your keyboard isn’t this one, but if you’re handy with wood and metalwork, it could look like this one!
This incredible keyboard was made with the blood, sweat, and tears of [Kurt Plubell], an architectural draftsman. He began a few years ago when he hung up his T-square and started using CAD for his work. His biggest complaint about CAD? Ergonomics! His setup slowly evolved as he was determined to find the most comfortable way to work. First, a keyboard and a trackball. Then, a keyboard, a trackball, and a left-handed mouse. Then, an ergonomic keyboard on a desk mounted tray (and trackball + mouse) — he still wasn’t satisfied. Thus began his journey into a fully customized setup.
He started with the ErgoDox keyboard, which is a two-part ergonomic keyboard. He ordered the aluminum version, which isn’t quite as nicely finished as you would think — but we doubt the manufacturer was expecting its consumers to be taking it apart and integrating it into something else. A lot of sandpaper, die grinding and polishing later, and it had a much nicer finish.
The keyboard was built up using wood and MDF, and finally finished with a very nice wood veneer, giving a very executive finish to the project. He’s integrated four arcade buttons and a Kensington track ball in the very middle — and of course, being a true typist, his keys have no markings.
His friends call him [Jeroen], but everyone else on the Internet knows this god of hacks and mods as [Sprite_TM]. He’s done everything from hacking hard drive controllers to making the best computer ever made even better. As one of the preeminent hardware hackers around, we’re proud to have [Sprite] as a judge in The Hackaday Prize, and happy to interview him on his thoughts on connected devices, the cloud-based Internet of Things, and his process of opening up black box devices for some sometimes subtle modifications.
You’re well known for your highly technical electronic hacks on your
blog SpritesMods. What about the professional side of your life, what kind
of projects keep you busy there?
I’m a software developer for a big broadcasting equipment manufacturer. Every now and then a hardware project comes along and I try to grab those too.
Continue reading “Judge Spotlight: Sprite_TM”
Somewhere between San Diego and South Carolina is an unmanned aerial vehicle attempting to make the first autonomous flight across the United States. The plane is electric and requires a landing and battery swap every hour or so, however the MyGeekShow guys are so far the only non-military entity to attempt such an ambitious flight.
The plane making the multiple flights is a Raptor 140 capable of cruising at 75 kph for about an hour before requiring a battery swap. Ground control is an RV, loaded up with LCDs and radios; as long as the RV is within a kilometer or so of the plane, the guys should be able to have a constant telemetry link.
Already the guys at MyGeekShow have pulled off a 52 km autonomous flight, following their flying wing in a car. Even though a hard landing required swapping out the carbon fiber spar for an aluminum one, the plane making the truly cross-country flight is still in good condition, ready to land on a South Carolina beach within a week.
You can follow the trip on the MyGeekShow Twitter. The guys are pulling off an incredible amount of updates and even a few live streams from the mobile command station.
UPDATE: It crashed. Tip stalls aren’t your friend, and undercambered wings exist. Good try, though.
[Quinn]’s friends were getting married, and while the couple wanted something like a ‘unity candle’ ceremony, they though simple candles were entirely unimpressive and ultimately not very entertaining for the guests. They decided a unity fireball would be a much better representation of their relationship, and were lucky enough to have a good friend that could build one.
The design of [Quinn]’s unity candle consisted of a control box with two key switches, a giant button, and the gigantic propane fueled candle set well back from the bride, groom, and guests at the ceremony. The candle itself releases the entire contents of an accumulator tank over a hot surface igniter, creating a thirty foot fireball without a visible pilot light, or the loud jet-like sound you would get from a traditional ‘poofer’.
As with all giant fireballs in front of an audience, safety was of the highest concern. [Quinn] didn’t use a full propane tank for this build, instead, a new, purged, and never used tank was used as an accumulator, storing just enough propane for one giant fireball. All the valves, regulators, and plumbing were rated for LP, and [Quinn] even filled out the proper forms and got the local fire department to sign off on it. It’s safer than [Caleb]’s Mario fire flower, but you still shouldn’t try this at home.
Video of the ceremony below.
Continue reading “The Unity ‘Candle’ With A 30 Foot Flame”
Some people are very picky about their pens. Entire forums exist to discuss the topic of pen superiority. However, it comes down to a personal choice. Some people like gel while others prefer ballpoint.
[Jens] built a drawing robot that produces drawings like the one seen here. It uses several linkages connected to two stepper motors, which give fine control over the pen. With the robot working [Jens] set out to find the best pen for robotic drawing.
Seven pens were tested on the machine, each drawing the same pattern. [Jens] found that gel and rollerball pens work the best on the robot, and started examining the performance of each.
The pens all performed differently, but two winners were chosen to use in the machine. The Pentel Energel Deluxe RTX and the Pilot G-2 07 beat out the competition since they maintained good lines at high speeds.
If you’re looking to build a drawing robot, [Jens]’ research should help you pick the best pen for your application. For inspiration, a video of the robot in action is waiting after the break.
Continue reading “A Robot’s Favourite Pen”