Voice Controlled Lock? Almost…

November 25, 2009 by Jakob Griffith 13 Comments

If you watched the video before reading the article (like we did) and started shaking in your boots at a voice controlled lock system, prepare to be disappointed. His spoken commands are actually to his son to press the appropriate keys on a keypad off screen, the lock is not actually voice controlled.

But still, [Michael Krumpus’] door lock is pretty astounding. By using a torn apart CD drive he easily attains a nice fast and smooth linear motion to bolt and unbolt his door. It wont open his door like some locks we’ve seen, but it will probably be added sometime in the future…right alongside voice commands.

[via DVICE]

Digital BMXing Through San Francisco

November 25, 2009 by Caleb Kraft 3 Comments

[Alpay] sent in this project he did recently. He was hired to produce a kiosk that would stand out to the kids at the event. He chose to make a bike riding game utilizing open source hardware and software. There was some thought put into what interface to use to make it easiest for people to just pick up and use. The ultimate decision was a simple one. Use real handle bars from a bike. As for software, they used Blender, the open source 3d creation program. The actual control is done via a pair of Arduinos, an accelerometer, and a pair of XBee modules.

He notes that blender is fully capable of accepting the serial input from the controller, but they opted to have the controller mimic keystrokes to make life easier on the developer, as well as make the controller usable on more games. Maybe if enough people ask really nice, he’ll release the source code for the controller.

Commodore SQ1000 Twitter Wall: The Twypper

November 24, 2009 by Caleb Kraft 12 Comments

[youtube=http://www.youtube.com/watch?v=CV9_25N21eM]

Before we begin, let us soothe those first dreaded thoughts. No, the commodore was not destroyed in the process. They can simply clip the 16 wires they added to interface the keyboard and be back to stock. Breathe a sigh of relief, and enjoy the twypper, a twitter wall made from a commodore SQ1000.

[Alex] needed to make an interesting project for his companies Openspace/hack day. A friend, suggested a twitter wall, and that’s when [Alex] got the idea for a typewriter. After a quick search, he found oomlaut’s typewriter. They didn’t let that deter them from making their own version though. They found a nice fully functional commodore SQ1000 and began hacking. Ultimately they simply decided to use an Arduino to short the key switches to simulate typing. There are all kinds of details on the necessary steps to get the typing to function absolutely correct on the project page. Over all it was well done and we’re happy to see that it can be undone just as easily.

Hack A Sketch

November 24, 2009 by Caleb Kraft 24 Comments

[vimeo = http://vimeo.com/7367464%5D

Sometimes we miss that old Etch a Sketch we had when we were kids. The challenge of producing a decent image using those two knobs was always fun and frustrating at the same time. This project lets us recreate this interface on our computer. The Hack a Sketch is a combination of an Etch a Sketch style input and a processing sketch to recreate the experience. They’re using an Arduino to interpret the inputs and feed it to the computer via USB. We really like this thing. Simplify the electronics and we could see this as a neat toy for sale somewhere like Thinkgeek.

[via hacked gadgets]

Multixylophoniomnibus

November 20, 2009 by Mike Szczys 17 Comments

[Ania] wrote in to let us know her team had finished the Multixylophoniomnibus and that they have posted an extensive writeup about it. We covered this augmented xylophone when it was still in development at the beginning of this month. Originally they wanted to use mallets wrapped in tinfoil as switches that close when they contact the metal keys, something akin to matchbox cars as a switch. This plan was thwarted when they realized the paint surface insulated the metal keys. At this point they switched to piezo sensors which turned into an odyssey of trial and error to achieve a reliable input for the Arduino to monitor. In the end they got it working with around forty lines of code, interfacing six boxes containing a different type of noisemaker.

See the finished instrument played in the video after the break. Alas, the addition of the piezo sensors do impede the resonance of the xylophone keys, but we still like it! There’s something reminiscent of the beginning of Pink Floyd’s Money when this is played.

Continue reading “Multixylophoniomnibus” →

DIY Mood Lamp Looks Store-bought

November 17, 2009 by Mike Szczys 25 Comments

[NeZoomie] built an RGB mood lamp as his first electronics project. He certainly hit it out of the park with this one, ending up with a design so clean it could be a commercial product. The controller is an Arduino board (further proof that this is a fantastic entry-level platform) that interfaces with 8 RGB LEDs. He’s built an enclosure out of thick polypropylene that does a great job of diffusing the light and adding a stylish look. The control system features a rotary potentiometer from SparkFun and what he calls a tilt-potentiometer of his own design after drawing inspiration from Hack a Day.

Blinky things are fun and that’s why we see a lot of mood lamps around here. Take a look at the video after the break and if you’ve got the parts, give this one a try!

Continue reading “DIY Mood Lamp Looks Store-bought” →

RFID Door Lock – The Right Way

November 17, 2009 by Mike Szczys 40 Comments

[youtube=http://www.youtube.com/watch?v=XT7E_GEIPVg]

[Pcmofo] has shared a well-built, well-explained example of how to implement an RFID key system for a door. We call this the right way because it is well thought out and functional. In the past we’ve seen doors that unlock via a secret knock, keypads, and RFID, but they are all non-permanent solutions capable being transplanted from one door to another. Rather than building a mechanism to turn the door handle, this implementation uses an electric strike mounted in the framing of the door to allow access. These are used for security doors in buildings and are built to keep your door secure.

The hack in this case is the electronics. Using an AVR ATmega168 running the Arduino boot-loader, [pcmofo] has prototyped a two-part design. An RFID reader is mounted outside the door with data wires running to the inside where the microcontroller resides. A hard-coded RFID card is used as a “master” to train any number of tags for entry. The master puts the device in training mode and the next tag to be read is added to the list of tags authorized to open the door.

We like messy wires and quickly thrown together devices but this is built to last and will look great once mounted in an appropriate enclosure.