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Mod turns your graphing calculator into a selfie camera
Your graphing calculator may not be getting much use these days now that other mobile devices can do the job, but it still has a few tricks up its sleeve if you're willing to do some tinkering. Christopher Mitchell's latest project, ArTICam, lets you turn a TI-83 Plus or TI-84 Plus calculator into a selfie-oriented camera. The mod mostly requires a Game Boy Camera and a programmable Arduino board like the Uno. After a little bit of wiring and some (thankfully ready-made) code, you can snap self-portraits with a calculator command. The 128 x 123 grayscale pictures you take won't win photography awards, but that's not the point -- this is more about having fun with gadgets that might otherwise sit in the closet gathering dust. Hit the source link if you have the gear and want to give ArTICam a whirl. [Thanks, Christopher]
When WiFi imitates art
For most of us, the only way we can see the strength of a WiFi network is by the familiar signal icon on any given device. Newcastle University School of Architecture doctorate student Luis Hernan, however, has a different method: spirit photography. He's using the new age-y method of capturing someone's aura via electric coronal discharges -- a Kirlian Device -- with a few geeky augmentations (an Arduino Uno board and WiFi Shield, for example) to illustrate how strong a wireless broadcast is with colors. As Wired notes, these components take account of the nearby signal and convert it into color information that's then beamed onto an LED strip; red being the strongest and blue being weaker sections of the network. To create the pictures like what you see above and at the source, Hernan swung the home-made device around after setting up long-exposure shots with a camera. While we can't know for sure, we'd imagine that something with no signal would look a lot like this.
Researchers use alcohol, Arduino and a desk fan to send molecular text messages (video)
Scientists from York University in Toronto are using alcohol as a method for sending text messages. How, exactly? By converting sprays of isopropyl alcohol into binary code, using off-the-shelf components. The researchers used an Arduino Uno board, an Adafruit LCD, a desk fan and a household spray bottle to transmit a short message across a tabletop, via molecular diffusion. In the experiment, the fan pushed bursts of alcoholic mist across a table, where a sensor at the other end measured the alcohol content of the air. From there, the vapor was reassembled into non-binary characters and the phrase was successfully reconstructed. Naturally, the transmitted words were "O Canada." The university says that this chemical form of data transmission could easily be shrunk to the microscopic level and find use in the medical field for targeted drug delivery. Conversely, the system could expand in size and offer communication through sewer systems or be used in search and rescue situations; basically, anywhere that traditional radio signals just won't work.
This Arduino hackaphone was never going to be pretty, but it does the job
Okay, we'll admit that it looks a bit like a baby monitor. But in contrast to those over-engineered pieces of parenting paraphernalia, this DIY cellphone can actually make calls and send texts over GPRS. More importantly, Hackaday claims it was put together by a lone hacker ("Victorzie") from an assortment of off-the-shelf and modded parts, including a TFT touchscreen, lithium ion battery, charging circuit, GPRS module and shield. These components were hooked up to an Arduino Uno microcontroller running a barebones UI and then jammed into a 3D printed case, which makes the device look far more pocketable than some previous hackaphone efforts. The end result inspires big respect for the creator, but also, more grudgingly, for the pro engineers at places like Nokia, who can pull all this stuff together and even get it FCC-approved for just a few dollars.
Homebrew 8-bit computer packs in 16 cores, multitasks like a champ
It looks like Jack Eisenmann has done it again. A couple of years after the hobbyist hacker built his first 8-bit computer, he's cobbled together yet another one, but this time with a whopping 16 cores. Appropriately dubbed the DUO Mega, the multicore wonder is made with 16 ATMega328p microcontrollers, each connected to an 8-bit data bus and designed to interpret a custom bytecode that runs the software. Compiled inside a nondescript plastic bin, the machine is also comprised of 16MHz crystal oscillators attached to each of the aforementioned cores, three Arduino UNO boards, 32kb of SRAM, 512kb of flash memory, eight breadboards, an Ethernet shield, a VGA out port and a multitude of components that combine to look like that mess of wires seen above. Because of all that processing power, this relatively primitive machine multitasks beautifully and can perform complicated calculations at an impressive clip. To get a demo of what this marvelous feat of DIY computing can do, have a peek at Eisenmann's video, complete with an 8-bit soundtrack, after the break.
Adafruit explains how to build your very own HAL 9000 for less than $100
It may be 2013, but 2001 will forever hold a special place in our hearts, in no small part due to the that lovable, red-eyed supercomputer known as HAL 9000. ThinkGeek has given us a couple ways to purchase HAL for our homes, but for folks who'd rather build their own, Adafruit's got you covered. User Phillip Burgess has posted the full instructions on how to craft one, provided you've got access to a laser cutter and the requisite soldering, spray painting and sanding chops to complete the task. Adafruit's version will have you making HAL out of an oversized arcade button and a sheet of acrylic -- and if you want your HAL to talk (and really, why wouldn't you), you'll need to build a voice box from an Arduino Uno board and an Adafruit Wave Shield. Total cost: just shy of $100. Check out the video of it in action after the break, and head on down to the source link for the full how-to. Oh, and feel free to whistle Sprach Zarathustra while you work.
Homemade self-balancing unicycle uses an Arduino to keep upright
On the whim of a coin flip, Nick Thatcher once decided between building a homemade Segway, or a self balancing unicycle. Even though the powers of fate chose the former, Thatcher's thirst to build wasn't quenched -- he built the one-wheeled scooter anyway. The Raptor looks a lot like a Ryno unicycle built from spare parts -- a chain driven wheelbarrow wheel powered by a 350w geared motor, a pair of batteries wired in series, some PVC and polycarbonate, an IMU gyro and an Arduino UNO -- all hobbled together to form a one-wheeled electric mount. Thatcher says the scooter can push 10mph safely, but faster speeds tend to outpace the gyro's corrective efforts. Still, the bike promises between 90-120 minutes of face-plant free fun, provided the rider is at least a little balanced. The motorized unicycle isn't for sale, but peek on over to Thatch Industries for a parts list, or scoot on past the break to see the bike in action.
Ben Heck fashions a pocket computer with an Xbox Chatpad and Arduino Uno
It's great to see Ben Heck focus his efforts of do-gooder projects like that foot-controlled wheelchair, but we'll always have a soft spot for the modfather's more nostalgic undertakings, like this BASIC pocket computer. Heck created the device for the latest episode of his web show, and if you're following along at home, you'll need the Chatpad from an Xbox 360 controller, an Arduino Uno and a LCD display -- a Hitachi HD 44780, in this case. The modder-turned-host is quick to point out that the project's purpose isn't solely nostalgic -- you can also use it to control real world objects, which in the Heck's case means a ghost on a pinball playfield. Check out a video of the invention in action after the break.
Digispark, Arduino's unofficial kid brother, takes Kickstarter by storm (video)
Hobbyist Erik Kettenburg was concerned that the size and cost of Arduino stifled his ability to craft, so he set about developing Digispark. It's an Arduino-compatible board, the size of a quarter, that offers a few pins at around a third of the cost of an Uno -- so you don't have to worry about taking projects apart when you're done. Designed to be fully compatible with the Italian standard, it's packing six I/O pins, 8k memory and a full USB connection amongst other things. The aim is to retail the gear for $12 a piece, and has been so popular that it's made nearly $100,000 in Kickstarter pledges, smashing its original goal of $5,000. We've got video for you below, and you can still throw some cash Mr. Kettenburg's way if you fancy getting your hands on one quickly.
OLED Lego train station emerges from Adafruit and Arduino gear, minifigs to get home on time
Who knew Lego characters had to be somewhere in a hurry? Adafruit did, as it just whipped up a minifig-sized train schedule. The invention mates one of Adafruit's own 1-inch OLED boards with an Arduino Uno controlling the schedule behind the scenes. It looks to be a straightforward project for the DIY types, although the display is currently all show: the schedule doesn't (yet) pair up with the train tracks to automatically let your minifigs know if their trip to the pirate spaceship castle has been delayed by ghosts. You can check the source link for the full instructions. Duplo builders, alas, are kept out of the loop.
Ben Heck's Android-controlled pot-stirrer does (most of) the cooking for you
Ben Heck is always thinking up gadgets that make life easier, from completely hands-free luggage to a sensor system for improved cycling safety. His latest mod is meant for those of us who have burnt Ramen a few too many times. His so-called Ben-Stur Remote Control Android app works with a pot-stirring device, freeing users to stray from the kitchen while their meal is cooking. The app works via Bluetooth, and the pot-stirrer consists of an actuator arm, a chip clip, a timing belt and, of course, a wooden spoon. Heck used a Google ADK and an Arduino Uno for the control mechanism that communicates between the app and the stirrer. In the tablet app, users can check their food's temperature and control the speed of the spoon's stirring. If that whets your appetite, click the source link for more info -- and check out our Maker Faire interview with Mr. Heckendorn himself.
IRL: Logitech UE Air Speaker, the Canon Rebel XT and an Arduino non-starter
Welcome to IRL, an ongoing feature where we talk about the gadgets, apps and toys we're using in real life and take a second look at products that already got the formal review treatment. Welcome back to IRL, and if we do say so ourselves, this week's edition is a doozy. On one end of the gadget-loving spectrum, Jason is still happily using his Canon Rebel XT, while Darren remains thoroughly unsatisfied with his $400 AirPlay speaker (it was easy to set up, at least -- he'll give it that). And, just for good measure, we threw in an Arduino fail. So, which piece of audio gear is on our "do not buy" list? Who needs to take a course in wiring-based coding? And does Jason have anything negative to say about his DSLR? Head past the break to find out.
Four Bit Maze dares you to solve its puzzles, work your way up to the Lament Configuration
Got a relative who keeps cheating his way out of your yew maze? This holiday season, perhaps you should consider a different kind of challenge: Oskar van Deventer's Four Bit Maze. The apparently simple goal is to move the quartet of sliders from zero to one, but an Arduino UNO microcontroller makes things a bit trickier. It's programmed with ten different puzzles, each requiring a different sequence of movements to solve. An Arduino Motor Shield operates the motorfaders, and the whole thing's USB-programmable, meaning you can tweak it to your heart's content. See an in-depth video demonstration after the break if this sounds like your idea of fiendishly difficult fun.
Rich Decibels Brainwave Disruptor scrambles your head, not your eggs
Child of the '80s? Then you'll most likely remember those notorious PSAs about your brain and eggs, and the dangers of turning yourself into an omelette. Yeah, well turn off your inner Nancy Reagan for a second because we've got an Arduino hack that should have you just saying yes. New Zealand artist Rich Decibels created a homebrew brain entrainment device that uses low frequency sound and light to induce different mental states. The mod pieces together an Arduino Uno with two separate interface boards -- one for pitch and separation controls, the other for LED and volume -- to deliver a combo of binaural beats (two slightly out of sync tones) and flashing headset-mounted lights that'll slow down those cerebral hertz cycles. If you happen to live in the land made famous by Frodo's Shire, you can check out the brain-slowing goods at Thistle Hall's Project Briefcase exhibition. Not a Kiwi? Then be sure to hit the source for an audio taste of this hacked head experience.
