[Gaurav Taneja] was showing off his projection clock add-on for iPhone called Clockety at this year’s Consumer Electronics Show. The concept is pretty neat, a clip-on clock which uses the iPhone flash LED as the light source. It may sound a little gimmicky until you see the functionality of the accompanying app which is shown off in the video after the break. Once clipped onto the phone, you lay it face down on your night stand and a gentle tap on the furniture will turn the projection on or off. This is a killer feature when you’re staying some place without an illuminated bedside clock.
Loading point and shoot digital cameras is old hat around here, but [Alex] and [Andreas] are taking it to the next level. They’ve made a Bluetooth controller for a cheap Canon camera, allowing pictures to be taken with an iPhone or Android device.
The camera in question is a Canon IXUS70, although any camera supported by CHDK will work. We’ve seen a few builds using this firmware to take pictures of the sunrise every day and transmitting images over a radio link, but this build is far more interactive.
The camera is connected to an Arduino and Bluetooth shield with a hacked up USB cable. The ‘duino communicates with a phone using a JQuery app, giving any phone with a Bluetooth module control of the camera’s zoom and shutter.
All the code is available on the github, with a very good video demonstration of the build available below.
A few years ago, [Michele] built a mobile device with a touch screen, a relatively powerful processor, and a whole bunch of sensors. To be honest, the question of why he built this was never asked because it’s an impressive display of electronic design and fabrication. [Michele] calles it the iGruppio. Although it’s not a feature-packed cell phone, it’s still an impressive project that stands on its own merits.
Inside the iGruppio is a Pic32mx microcontroller, a 240×320 TFT touchscreen, and enough sensors to implement a 10 DOF IMU. The software written for the iGruppio is heavily inspired by the iPhone and a completely homebrew project – all the software was written by [Michele] himself. While the first version of the iGruppio was a little clunky, the second revision (seen in the pic above) uses an old iPhone case to turn a bunch of boards and plugs into a surprisingly compact device.
No, there’s no cellular modem inside the latest version, but [Michele] has put all the sources up on Github, and anyone wanting to build a homebrew cell phone could do worse than to take a look at his work. Video demo below.
RFID security systems have become quite common these days. Many corporations now use RFID cards, or badges, in place of physical keys. It’s not hard to understand why. They easily fit inside of a standard wallet, they require no power source, and the keys can be revoked with a few keystrokes. No need to change the locks, no need to collect keys from everyone.
[Shawn] recently set up one of these systems for his own office, but he found that the RFID cards were just a bit too bulky for his liking. He thought it would be really neat if he could just use his cell phone to open the doors, since he always carries it anyways. He tried searching for a cell phone case that contained an RFID tag but wasn’t able to come up with anything at the time. His solution was to do it himself.
[Shawn] first needed to get the RFID tag out of the plastic card without damaging the chip or antenna coil. He knew that acetone can be used to melt away certain types of plastic and rubber, and figured he might as well try it out with the RFID card. He placed the card in a beaker and covered it with acetone. He then sealed the beaker in a plastic bag to help prevent the acetone from evaporating.
After around 45 minutes of soaking, [Shawn] was able to peel the plastic layers off of the electronics. He was left with a tiny RFID chip and a large, flat copper coil. He removed the cover from the back of his iPhone 4S and taped the chip and coil to the inside of the phone. There was enough room for him to seal the whole thing back up underneath the original cover.
Even though the phone has multiple radios, they don’t seem to cause any noticeable interference. [Shawn] can now just hold his phone up to the RFID readers and open the door, instead of having to carry an extra card around. Looking at his phone, you would never even know he modified it.
[Thanks Thief Dark]
Phones, MP3 players, designer bags, artwork, money…. anything with value will bring out the counterfeiters looking to make a quick buck. Sometimes the product being counterfeited isn’t even necessarily expensive. For example, an Apple iPad Charger. [Ken Shirriff] got a hold of a counterfeit iPad Charger, took it apart, and did some testing.
So why would someone buy a counterfeit product? To save some money! The counterfeits are usually cheaper to reel the potential buyer in thinking they are getting a deal. In this case, the Apple product costs $19 and the knock-off is $3, that’s a huge difference.
Wanting to display his Google calendars [Chris Champion] decided to mount an old monitor on the wall. The hack is his installation method which recesses both the bracket and the outlet while still following electrical code (we think).
Since we’re already on the topic. Here’s a hack-tacular project which hangs a laptop LCD as if it were a picture frame. We do really enjoy seeing the wire, which connects to the top corners and hangs from a single hook a few inches above the screen bezel. There’s something very “whatever works” about it that pleases us.
[Jaspreet] build a datalogger in an FPGA. He put together a short video demo of the project but you can find a bit more info from his repo. He’s using a DE0-Nano board which is a relatively low-cost dev board from Terasic.
Want to see what’s under the hood in the processor running a Nintendo 3DS? Who wouldn’t? [Markus] didn’t just post the die images taken through his microscope. He documented the entire disassembly and decapping process. Maybe we should have given this one its own feature?
If you’re streaming on your Ouya you definitely want a clean WiFi signal. [Michael Thompson] managed to improve his reception by adding an external antenna.
We always like to hear about the free exchange of information, especially when it comes to high-quality educational material. [Capt Todd Branchflower] teaches at the United States Air Force Academy. He wrote in to say that his ECE383 Embedded Systems II class is now available online. All the info can also be found at his Github repo.
And finally, do you remember all the noise that was made about 3D printed guns a while back? Well [Mikeasaurus] put together the .iStab. It’s a 3D printed iPhone case with an integrated folding blade…. for personal protection? Who knows. We think it should be a multitasking solution that functions as a fold-down antenna.
While we can’t condone the actual use of this device, [Husam]’s portable WiFi jammer is actually pretty cool. It uses a Raspberry Pi and an Aircrack-ng compatible dongle to spam the airwaves with deauth packets. The entire device is packaged in a neat box with an Arduino-controlled LCD and RGB LEDs. Check out an imgur gallery here.
You can pick up a wireless phone charger real cheap from any of the usual internet outlets, but try finding one that’s also a phone stand. [Malcolm] created his own. He used a Qi charger from DealExtreme and attached it to a 3D printed phone stand.
A while back, [John] noticed an old tube radio in an antique store. No, he didn’t replace the guts with a Raspberry Pi and an SD card full of MP3s. He just brought it back to working condition. After fixing the wiring (no ground cord on these old things), repairing the speaker cone, putting some new twine on the tuner and replacing the caps, [John] has himself a new old radio. Here’s a video of the complete refurbishment.
Here’s a Sega Master System (pretty much a Game Gear) running on an STM32 dev board. Also included are some ROMs for some classic games – Sonic the Hedgehog, Castle of Illusion, and The Lion King. If you have this STM Discovery board you can grab the emulator right here.
[Spencer] wanted a longer battery life in his iPhone, so he did what any engineering student would do: he put another battery in parallel.
Breadboarding something with an AVR or MAX232? Print out some of these stickers and make sure you get the pinouts right. Thanks, [Marius].