If your next project needs the ability to play MP3s but you don’t have a lot of room to spare in your enclosure, [Boris] has just the thing you need. His tiny embedded MP3 module supports playback of up to 65,536 songs or as many as you can fit on a 16GB microSD card, which isn’t bad in the least.
The module relies on a PIC24F for input and control, while a VS1011 handles all of the MP3 decoding responsibilities. He says that the module would be great for voice-enabled vending machines, telephone systems, cars, and more.
With such a wide range of possible applications, he decided that the module should be able to support several different input methods. The board can be controlled via a set of digital input buttons, which is perfect for direct human interaction, while it also supports serial control for scenarios where it is part of a larger embedded system.
Of course, we’ve seen tiny MP3 players like this before, but we like the fact that this module was designed to operate in standalone mode or as a component in a larger device. Of course all of the device’s schematics, code, and a BoM are available, allowing you to build your own if you are comfortable with SMD soldering.
Arduino + PS2 controller + R2D2
Here’s an unbelievably real-looking R2D2 replica driven by a PS2 controller with an Arduino inside that plays sounds from the movies. Too bad we couldn’t find any more details about it. [Thanks Bill]
Server build time-lapse
[Justin] and his colleagues spent five days upgrading their server by building a 29-unit cluster. Lucky for us they set up a web-cam to capture the process.
Behold this working desktop computer, complete with monitor and mouse. We’re not sure how it was done, or what it’s for, but worth a peek just because of its size. [Thanks Harald via Dvice]
Modelling self-assembling viruses
A 3D printer and magnets were used to build this model of a self-assembling virus. Shake the jar and it falls apart. Shake a bit more and it’ll rebuild itself… it has the technology.
[Simon] is exercising his geek chic with these Tardis cuff links. The Doctor Who inspired accessories were made from a model railroad telephone booth.
[Fabio Varesano’s] new Arduino compatible board packs a full power punch in a ultra compact layout, measuring at 20.7×15.2 mm, the Femtoduino is probably the smallest 328 based Arduino compatible board around. Most of the staples are present, an QFN atmega328, an MIC5205 low dropout regulator good for a couple hundred milli amps, 16MHz ceramic resonator, reset, power indicator and pin 13 LEDs, but you will need to provide your own serial connection (FTDI, MAX232 etc) and another AVR programmer to get the Arduino boot loader onto the chip.
Since the board is small (smaller than a pro mini) it is not directly breadboard friendly. Even though the hole spacing is 0.05 inch, the size is large enough for “normal” wire to fit into fine, if you wish to use 0.1 inch spacing there is a handy break out board you can make where the Femtoduino just snaps in.
Everything needed to make one of your own is provided on the website, schematics, kicad files, bill of materials, Gerbers for both the board and the breakout board, though we would like to see this as a pre-made board soon, join us after the break for a video and see why.
Continue reading “Ultrasmall Arduino”
We love arcade games. Who doesn’t? We feel that the “arcade” feeling just can’t be replicated in any other form factor than an arcade cabinet. [Moslevin] must feel the same way too. He has built, what could possibly be the worlds smallest arcade cabinet. Aside from a coin mechanism, it is fully functional. It is an ATMega328p running his own custom software. The games he has available are Tetris, Invader, and Breakout, all coded by himself as well. We’ve seen small arcade cabinets before, but none this small.
This tiny bot wants to go inside your body. That’s right, it was designed to travel through veins. The little bot has no on board propulsion system. It is controlled by a magnet outside the body. See those little spines? Those straighten out to keep the bot in place when it isn’t supposed to move. Creepy right? In all the articles we’ve seen on this bot, there aren’t any details about what actually is on board. They mention adding a camera in the near future, but why are they calling it a robot? Surely there’s something cool in that little body. This is a quite practical application of a project we covered recently. Commenters weren’t impressed with the external control system, likening it to the old vibrating football player game. Well, here’s where it could be usefull.
Here’s an interesting concept, the bot pictured above has no internal control mechanisms. His claims to have built the smallest bot are dubious, considering it requires a much larger control platform to function, so lets just set that aside and look at how it works. The bot itself is basically a hollow box with a hinged manipulator mounted on it. He has then built a modified CNC type structure with various magnets below a platform. The magnets can move the bot and control the manipulator (assuming the bot isn’t trying to pick up anything magnetic). He talks about this being a possible control scheme for smaller bots, though we think he would have to make some major advancements to his magnetic controls for accuracy’s sake. As for his claims of being the smallest, well, we’re sure we’ve seem similarly sized bots, even hexapods, that were completely self contained.
[tioguerra] helped make these tiny bots for the World Robocup 2008 in china. There’s tons of information on the Mixed Reality forum, but you might be specifically interested in the bot section. There are breakdowns of different aspects, such as charging and IR communication, as well as some great photographs of the unit along with a smaller one. The construction of the robot seems so nicely fit together, someone spent a lot of time getting the design just right. Since we don’t see a new section for 2009 bots, we are guessing that they’ll use this design again.