As iPhone remote control projects go we've certainly seen bigger than this Arduino-based iPhone-controlled tank, but it does have the benefit of being somewhat more achievable for the average DIYer than a full-sized car, say. Chris Rojas threw together the tabletop tank from a basket full of SparkFun parts, and now has a solar-powered vehicle he can control from his cellphone.
Remember the Twitter-reading robot fish from back in September? At its core was an mbed microcontroller, a $60 alternative to the Arduino intended for rapid prototyping, and we're now seeing the first of the optional baseboards for the mbed filter through. Embedded Artists' have come up with the LPCXpresso, a 'board positively bristling with connectivity and inputs that includes an OLED display, accelerometer and light sensors, joystick and wireless.
Not being a Harry Potter fan the "wearabouts clock" has passed me by, but this DIY location-indicating replica is impressive enough even without the back story. The concept is that rather than display the time, the clock's numerous hands show whereabouts each family member is, according to various locations (or situations, such as "mortal peril") around the clock face. As for the magic inside, our old friend the Arduino and a hacked Linksys router monitor Twitter for location updates.
The first generation of the system attempts to recognize the first few words in the tweet - it monitors a different Twitter stream for each hand - and then shuffles the indicators around to the appropriate point. If the message can't be interpreted that way, it points to "read me".
Electronic versions of the classic Etch-a-Sketch aren't particularly unusual, but so far this is the first time we've seen Arduino-controlled knobs with physical resistance and a proper shake-to-clear integrated into such a project. The Hack-a-Sketch takes a Lenovo ThinkPad laptop and adds the usual two Etch-a-Sketch rotary knobs; this time, though, they're hooked up to two potentiometers which control the onscreen drawing.
Ah, Arduino - is there anything you can't do? Didgeridoo enthusiast Kyle Evans decided to take his instrument of choice into the wireless age, by coupling it with a Bluetooth-capable Arduino microprocessor and custom-built externally-mounted sound modules that allow the player to manipulate the sound and control various software instruments (that, again, have been custom created). The end result looks like it should fire rockets and sounds like nothing on Earth.
Weddings are reasonably good fun for those attending, but being expected to provide an often-expensive gift can sometimes irk. So how about giving a present that demands a little more than simply scribbling a thank-you card; that's just what Mikal did for the friend who introduced him to Arduino tinkering. He constructed the Reverse Geocache Puzzle, a wooden box that would only be unlocked when within 2km of a location Mikal preprogrammed into it.
Is there any better hack than making a robot fish read out Twitter messages? If there is, don't tell Dan Ros about it: he's spent his spare time hooking up a Big Mouth Billy Bass "novelty" fish to an mbed microcontroller. Initially the fish merely repeated .wav files from an SD card, but then they used the mbed's HTTPClient library to pull in tweets instead.
Hard-drive based media players aren't anything new, but hifi equipment actually built from old drives are somewhat rarer. At Hifiduino they're using an Arduino microprocessor to construct a DIY preamp, and they've salvaged a deceased hard-drive to form the base and the top.
We can't all be Jean Michel Jarre, but thanks to the Arduino microprocessor we can flail our arms around and make music. Omer Yosher's "Airpiano" is a long strip of motion sensors treated as, via the Arduino, midi keys and faders; moving your hands over and through the sensors control notes or samples, as well as volume.
There's little as pleasant in life as freshly-baked donuts. Or chocolate cake, or perhaps cup cakes or sourdough bread. That's why more bakeries should consider investing in a BakerTweet: designed by Poke London, it's an easy way for bakeries to send out messages - via Twitter - that more things are fresh out of the oven.