An exhibition just wrapping up at the Russian Frost Farmers Gallery in New Zealand presented an interactive artwork hack. Called the Radio Assisted Drawing Device (R.A.D.D), it is a plotter that mounts on the wall. It isn’t computer controlled, but rather relies on a remote control with two sticks to move the plotter Etch-a-Sketch style.

A clear gantry mounts vertically and travels along the top edge of the wooden backing. A slot cut in the acrylic steadies the plotter and allows for smooth vertical movement. Obviously built by hand, the mechanics seem to have tight tolerances for precise movements of the stylus. See the exhibit in the video after the break.

Wouldn’t you love to have one of these on the wall at your next party? It adds a whole new spin on a guest book.

[Thanks Rich]

These days, HTPCs are becoming more and more common, however controlling the content elegantly can be a painfully annoying problem. Roteno Labs have come up with a wonderful solution they call the RFiDJ. Similar to the RFID phone we covered earlier, they used a set of picture frame coasters and mounted descriptive pictures as well as unique RFID tags in each one. When a coaster is placed in the sensor area the server begins streaming that particular selection, including local news, This Week in Tech podcast, and other specific albums. Roteno Labs even managed to include a “shuffle” tag which would play content randomly out of a library. The end result is very well put together, excellently documented, and there is even a working video after the break.

[Eric] just told us about the watch he developed that displays info from a BlackBerry via Bluetooth. The watch displays updates, message alerts, incoming call information, and… tells time. Setup and control is handled with the BlackBerry keypad. The device is charged with a micro-USB connection and will last for about four days without a recharge. We’d chalk up the rather long battery life to the use of an OLED display, which will use less energy when a portion of the display is left black.

So why is it here? Well, he’s got a couple of blog posts that detail two of the final prototypes that you might find interesting. What else? Oh yeah, his original prototype used an Arduino with a Nokia 3310 LCD display. For those of you who continually call the Arduino a worthless toy, looks like it’s good enough to use when taking a product to market.

We’ve received tips from a few different people about a new Bluetooth module that connects as a game cartridge for the Nintendo DS. This is a homebrew solution and not an official Nintendo add-on. The cartridge houses an ATmega168 microcontroller which provides the interface between the DS and a Roving Networks RN-41 bluetooth module.

They’ve provided a schematic for the device but we didn’t see any board artwork or pictures of the internals so you’re on your own for board layout. The libraries needed to use the bluetooth connection with homebrew software are up for download. This should provide a nice way to use the DS with a Bluetooth GPS module, or perhaps as a discrete Bluetooth sniffer and spoofer.

[Aaron] tipped us off about a project over at mobilehackerz. They built something of a PVR for 1seg broadcast stations (Google translation). The 1seg broadcast standard is aimed at mobile video service and available in countries like Japan and Brazil. Their terrestrial TV signals (ISDB-T) are divided into 13 segments per channel but the HD broadcasts only use 12 of those segments. This allows the 1seg data to be broadcast in the 13th segment.

mobilehackerz wanted to record each station’s complete daily broadcast. So they picked up a bunch of USB tuner fobs and chained them together with two powered USB hubs. The video is delivered in a type of MPEG2 format so once pulled out of the air the stream can be dumped directly onto disk. It seems they’ve got some code available for this system but even with the translated page we can’t really figure out what it does. If you’re Japanese skills are strong, fill us in with a comment.

At 3000 yen (about $34) per tuner this is not the most economical PVR capture system we’ve seen. Add to that the 15 fps broadcast and we’re not sure this is of all that much use. But then again, if you have to ask “what is it for?” you’re missing the essence of the hack.

As part of Nuit Blanche, Toronto’s annual community art event, the CN Tower’s lighting system got put to some creative use. Installed 2 years ago, the RGB LED-based system is composed of 1330 individually addressable lights lining the glass elevator shafts. It costs just under $1000 to run almost every evening for a month. Named ‘Bright Lights Big City’ (not to be confused with the book, movie, or song of the same name), this project was coordinated by [Ryan Stec]. The lights on the tallest freestanding structure in North America were animated to CIUT 89.5 FM for the entire night. This innovative solution allowed one to appreciate the light show from almost anywhere in the city with access to a radio.

In August we covered a wireless electricity presentation from the TED conference. Now Sony has put out a press release on their wireless flat panel television prototype. The device is capable of operating without audio, video, or power cables connected to it. This is possible at distances up to 50cm at efficiencies as high as 80%.

As was talked about in the comments of the other article, the efficiency compared to that of a cable doesn’t blow our socks off. But this does show mainstream development of this technology. We hope to see advances in both efficiency and distance. We also look forward to that small black box (which we presume facilitates the energy transfer) being integrated into the TV’s body.

[via Gizmodo]

Researchers at the University of Utah have been able to detect movement in a room based on variations in wireless signals. Accurate to about a meter, they are using a 34 node wireless network to do their sensing.  As a person moves, they change the signals, and can therefore be detected. They state one possible application being rescue workers deploying multiple wireless nodes around a building to find people located inside.

[via Gizmodo]

[Craig] wanted to use Boxee on his TV but his computer was in a different room. He rigged up a rather dubious method of delivering the A/V signal (this is a hack in the most guttural sense). More interesting to us is his solution for a remote control interface. We’re familiar with building USB connected infrared receivers but [Craig] decided to patch one into the serial connection on his Linksys WRT54G router.

Surprisingly there’s a lot of space in the router case to add more electronics. He connected a 7805 voltage regulator to the 12v supply for the router and used it to power an IR receiver module and an ATmega328. Because the serial port of the router needs 3.3v he uses a zener diode and resistor to drop the communications voltage. By loading Tomato as the router firmware the remote control signals can be communicated back to a python script running on the host machine.

We do have a few opinions about possible improvements. The use of an ATmega328 is about 30kB worth of overkill. We know that software-based usb infrared receivers run on under 2 kilobytes of programming space. Also, the IR receiver module used (TSOP1738) is obsolete. In this case, we might recommend the TSOP34138. By changing to this part and using a low-power AVR you should be able to run off of the router’s 3.3v regulated supply. This would get rid of the additional regulator and prevent adding even more heat inside the router chassis.

But hardware selection arguments aside, we love the creativity of this solution. Nice work!

Wireless headphones can be a wonderful way to help clear up the clutter inherent in most desktop PC systems. However, after plugging a wall wart in, and the headphone jack into the computer, the number of wires used has actually doubled. After [Parker] found an old set of JVC 900 Mhz wireless headphones (and a generic 900MHz transmitter), he cracked open the case to see what he could do with them. Realizing that the transmitter used a 12V DC source, he powered it with an unused floppy connector (which provides +12V, +5V, and two ground lines). He also wired the audio-in line directly onto his sound card headers rather than feeding out a headphone jack to the back. He then wrapped the whole thing in plastic to prevent unwanted shorting and placed it back in his PC, leaving him with a very functional wireless system. Detailed photos after the break.

a.ntivir.us wanted to use a different antenna for their Netgear mbr624gu WiFi router. Unfortunately, this model comes with an antenna that is not removable. As with other antenna retrofits, this involves no soldering. But because there is already a mounting area for an antenna, no case altering is needed either. After opening the router with a Torx driver it was discovered that the non-removable antenna was connected to the board with a mini rf connector (U.FL). The antenna and its mounting bracket were removed and a U.FL to RP-SMA adapter was put in its place using a washer to secure it to the rear plate of the router. Now any external antenna can be used and the router still looks brand new.

After reading about cheap wireless for microcontrollers, [Leigh] left a comment about his Marauders map. Much like the Harry Potter version, whoever holds the ‘map’ is able to see the location of the ‘marauders’ within certain bounds. Unlike the magical version however, each person being tracked needs to hold a PICAXE 08M, GPS, and 433.92MHz transmitter: while the map needs a computer running his Python script and a receiver of the same frequency. It has the potential for locating people, but we feel it might be better off in a swarm robotics setup.

With the transition to digital TV, the FCC has abandoned the old analog format. Luckily, you can take advantage of this and set up your own analog TV station. The FCC has a tool on their site to see what channels are open in your area to broadcast in. To broadcast, you need a TV transmitter, but cheap short-range models can be found on eBay or made at home [pdf]. Once you have a transmitter, you can pump in a video source, either your own content or videos from youtube. One group, OMGimontv is showcasing popular youtube clips on channel 14 in New York. On their site, users can vote for what clips they want to see. Although this isn’t as simple as making a radio station, it still has a lot of potential.

[via BoingBoing]

We’ve already brought you a homemade Twitter-enabled washing machine, and toilet, but now a new innovation is being brought to the table by a bigger player. IBM is working on a tweeting television remote, which would allow the user to inform the world what they are watching. Although unfiltered reporting could create awkward situations, the combination of America’s love for television and Twitter is sure to yield interesting results. They also mentioned that it could be configured to report to other sites, such as Facebook or joost. Any ideas why IBM would have in such a patent are welcome in the comments. More info can be found here and here.

Everybody loves microcontrollers, including the Arduino, allowing you to create whatever you imagine. That is unless you want to hack together something wireless. Originally you had to rely on the expensive XBee protocol or other wireless options, but no longer. Hobby Robotics found an extremely cheap transmitter and receiver and wrote a quick guide for wiring them up to an Arduino. Now your wireless projects can come to life, as long as you are within 500 feet and don’t mind 2400bps; minor trade offs compared to the gains of wireless freedom. Final note: You aren’t limited to Arduino, we would love to see someone modify this to work with a PIC or other microcontroller.