hackaday.com Archives - 15 February 2013, Friday

  • UDP between STM32-F4 Discovery boards

    UDP between STM32-F4 Discovery boards

    hackaday.com 15 Feb '13, 9pm

    [The Backwoods Engineer] tested out a new accessory kit for the STM32-F4 Discovery board. The image above shows two boards communicating with the UDP protocol . Notice the extra PCB into which each Discovery board has been plugged. This is a third-party add-on which adds Ethernet, RS-...

  • Airsoft turret has turn, tilt, and auto-feed to keep those BBs flying: Yet another project that proves you need...

    Airsoft turret has turn, tilt, and auto-feed to keep those BBs flying

    hackaday.com 15 Feb '13, 8pm

    Yet another project that proves you need to acquire a laser cutter. This Airsoft turret rotates, tilts, and includes a hopper for ammo . All of the pieces were cut from acrylic. The base includes a bracket which keeps the large rotating gear level by sandwiching it between the layers....

  • Cracking open a 24-port switch so you don’t have to

    hackaday.com 15 Feb '13, 7pm

    [Kenneth Finnegan's] post about this 24-Port HP ProCurve 2824 Ethernet Switch teardown was a delight to read. He’s taking an introduction to networking class at California Polytechnic State University. One of their labs included virtual machines shooting thousands of new MAC addresses...

  • Beginner’s Android/Arduino example shows the power of App Inventor

    Beginner’s Android/Arduino example shows the power of App Inventor

    hackaday.com 15 Feb '13, 6pm

    Check out the third button down; when was the last time you added voice commands to your project? It’s worth clicking through to see just how simple that portion was. App Inventor — a Google cast-out that is now maintained by MIT — is a graphical tool that unlocks the power of an Andr...

  • Quadcopter brain

    Quadcopter brain

    hackaday.com 15 Feb '13, 4pm

    You can see the effort he made to keep the board symmetrical which will help when it comes time to balance the aircraft. At the center of the PCB is the jewel of the sensor array, a combination accelerometer and gyroscope. This location will help easy the trouble of designing PID algo...

  • An awesome, futuristic, all-in-one robot chassis

    hackaday.com 15 Feb '13, 1pm

    It seams like the 3D designer has made such a good job that most of the discussion are immediately moved in the body/mechanic domain. But, when you are saying “not particularly intriguing” did you also took in account what is “inside” of this pretty looking body? In particular, there ...

  • Pulse jet snowmobile, or, what Swedes do during hibernation

    Pulse jet snowmobile, or, what Swedes do during hibernation

    hackaday.com 15 Feb '13, 11am

    Sweden is coming out of the depths of a cold, dark winter. What better time, then, to enjoy the last few weeks of frigid temperatures, short days, and frozen lakes and rivers? That’s what Orsa Speed Weekend is all about; tearing across a frozen lake by any means necessary, including j...

  • New post: Raspberry Pi as a plug-in hash harvester

    Raspberry Pi as a plug-in hash harvester

    hackaday.com 14 Feb '13, 8pm

    Plug in the power and Ethernet and this Raspberry Pi board will automatically collect Windows hashes from computers on the network. With a couple of RPi boards on hand [Travis] was searching for more hacks to try with them. This made a great little test to see how the board performs w...

  • Infra is a television made of Infrared pixels

    Infra is a television made of Infrared pixels

    hackaday.com 31 Jan '13, 10pm

    This television is perfect except for its low resolution and the fact that it can’t be seen by the naked eye. [Chris Shen's] art installation, Infra, uses 625 television remotes as pixels for a TV screen . There’s a little bit of insight to be gained from the details which [Chris] sha...

  • 12-axis sensor adds auto screen orientation to this older tablet PC

    12-axis sensor adds auto screen orientation to this older tablet PC

    hackaday.com 31 Jan '13, 8pm

    The hardware comes in two pieces. The first is a mini-PCIe card to USB interface. This is handy if you want to add a Bluetooth dongle permanently to your computer. But he’s got other things in mind for it. After hacking the BIOS (which for some reason limits what you can plug into thi...

  • How a dial-up modem handshake works

    How a dial-up modem handshake works

    hackaday.com 31 Jan '13, 7pm

    I’ve always wanted to see this! My modem curiosity has peaked lately as I’ve been wanting/trying to set up a PPP or dialup connection across wireless via some GMRS walkie talkies my dad gave me. I was going to crack them open, look for the IC(s) responsible for the transceiver and dat...

  • Getting an Arduino to control a wireless outlet

    Getting an Arduino to control a wireless outlet

    hackaday.com 31 Jan '13, 6pm

    [Reza's] methodical investigation of this remote controlled outlet let him patch in with an Arduino using a 433 MHz transmitter . This is a single-device unit, but the techniques used here should allow you to take control of wireless rigs that have multiple modules to control many dev...

  • Turning the Belkin WeMo into a deathtrap

    hackaday.com 31 Jan '13, 5pm

    “but of course there are a few security implications of having your electric kettle connected to the Internet.” Like what? I leave my kettle on at the wall all the time, I press the manual button on top when I want hot water, -the kettle turns itself off when it’s boiled. What implica...

  • Gas sensor suite built with Gadgeteer modules

    hackaday.com 31 Jan '13, 2pm

    If you value your time and want to be able to quickly & easily build prototypes or permanent projects then there is not a better choice. Maybe slightly more expensive than other options but most Gadgeteer mainboards typically have much more powerful than your typical mcu also. So, if ...

  • 7x7x7 LED cube driven by Arduino mega

    7x7x7 LED cube driven by Arduino mega

    hackaday.com 31 Jan '13, 1pm

    The cube is able to process 142 frames per second, that is, 1 frame every 7 milliseconds. Within this time period, it loops through a still frame 7 times (Each cycle of POV lasts 144 microseconds). This is able to compensate for flickering during video recording, allowing all camera’s...

  • The Keypad Contest

    The Keypad Contest

    hackaday.com 31 Jan '13, 11am

    What can you do with ten buttons and ten lights? A lot. [Andrew] and [Nathan] found a collection of Hale Research keypads being thrown out, and decided to host the Keypad Contest . The goal of the contest was to create something nifty using the ten buttons and ten lights on the keypad...

  • Feedback for automated water and food pet dispensers

    Feedback for automated water and food pet dispensers

    hackaday.com 30 Jan '13, 10pm

    [Enrico] figured out a way to fully automate his pet food and water . The system is in two parts, the water trough as seen on the left, and the food dispenser whose control hardware is shown on the right. The system is even hooked up to the network so that he can make sure it didn’t b...

  • New post: 3d printed hexapod robot

    3d printed hexapod robot

    hackaday.com 30 Jan '13, 8pm

    This hexapod was made almost entirely via 3d printing (translated ). The parts that you need to supply include a few fasteners to make connections, twelve servo motors, and a method of driving them. As you can see in the video after the break, all those parts come together into a litt...

  • Modulator box connects iPod to Tesla coil

    Modulator box connects iPod to Tesla coil

    hackaday.com 30 Jan '13, 6pm

    This pass through audio modulator lets you playback stereo audio on two Tesla coils . But don’t fret, you can just use mono files if you only have one coil on hand. On one side there are inputs that connect to the audio source. The other side drives the Tesla coil, switching it on and...

  • Really, really geeky wedding invitations

    hackaday.com 30 Jan '13, 5pm

    I am not sure if the whole wedding party and family consists of electronics hackers, it would certainly result in promising offspring, but the likelihood of it is small in reality. Let’s assume most guests were surprised by the novelty-invitation and will not ask for the ATtiny’s sour...

  • Controlling a Raspberry Pi with real life redstone

    Controlling a Raspberry Pi with real life redstone

    hackaday.com 30 Jan '13, 4pm

    We’ve seen computers built in Minecraft out of redstone, the game’s version of electricity, circuits, and digital logic. We’ve even seen a few redstone contraptions controlling real-world devices. [Angus]‘ build, though, takes things to a whole new level. He’s created a bridge between...

  • Mr. Tea is a hot plate and magnetic stirrer in the same enclosure

    hackaday.com 30 Jan '13, 3pm

    You heard us right, the stirrer is not combined with the plate, but resides on the underside of the same PSU enclosure. The plate itself is from a unit he bought at the store and cannibalized. The light switch dimmer lets him adjust the heat it puts out. When not hot, he can flip it o...

  • Automated Doors for Theatre Effect

    Automated Doors for Theatre Effect

    hackaday.com 30 Jan '13, 2pm

    For a theatre production, [Jason] needed a way to automatically open and close doors as a special effect. His solution, hosted on Github , lets him remotely control the doors, and put them into a ‘freak out’ mode for one scene in the play. Two Victor 884 motor controllers are attached...

  • Finding the cheapest board house

    hackaday.com 30 Jan '13, 1pm

    I wish seeed and itead etc would allow for less than 10 quantities on the bigger/4 layer boards. I want a few 10cm x 15cm 4 layer boards (I would like 6 layers really..). I want 3 or 4 not 10. If only I could pay slightly more per board and not have 6 expensive boards sitting around t...

  • Ask Hackaday: What’s an easy way to build a potentiometer for a soldering iron?

    hackaday.com 30 Jan '13, 12pm

    What he wants to do is build an adjustable current source. To do that from an ATX supply, he needs to change the supply’s original feedback circuit so it regulates the output current rather than the voltage. If you look at the supply schematic, you will see a voltage divider connected...

  • MIT Media Lab’s month in Shenzhen

    MIT Media Lab’s month in Shenzhen

    hackaday.com 30 Jan '13, 11am

    When you’ve got a month worth of blog postings it’s pretty difficult to choose one photograph that sums it all up. This one shows the tour group from MIT Media Lab in ESD garb ready for their tour of Okano SMT and Speaker Factory. It was part of a tour of Shenzhen aimed at bringing gr...

  • A look at the (now patched) security of [Kim Dotcom's] MEGA cloud storage service

    A look at the (now patched) security of [Kim Dotcom's] MEGA cloud storage service

    hackaday.com 29 Jan '13, 10pm

    MEGA is a new, encrypted cloud storage system founded by [Kim Dotcom] of MegaUpload fame. They’re selling privacy in that the company won’t have the means to decrypt the data stored by users of its service. As with any software project, their developers are rapidly making improvements...

  • Messenger bag LED matrix keeps bikers safe at night

    Messenger bag LED matrix keeps bikers safe at night

    hackaday.com 29 Jan '13, 8pm

    The design is quite simple, there’s a large flap which is attached at the top of the bag and has a couple of clips at the bottom to keep ti closed. On the inside of the flap he sewed a snap system which holds one piece of material on which all of the electronics are attached. The Lily...

  • Help hackaday buy our own 3D printer UPDATED!

    hackaday.com 29 Jan '13, 7pm

    I have a friend who could use a specialized controller, he has one hand, if you are going that route Im sure any company that makes 3d printers would be more than happy to support you in this endeavor. just outline the plans that you have and I bet you would get one within a week. Als...

  • Adapting the Nexus 7 for a double DIN car dashboard opening

    Adapting the Nexus 7 for a double DIN car dashboard opening

    hackaday.com 29 Jan '13, 6pm

    a lot of these dashboard tablet installs , [James] didn’t need any Bondo, sanding, or painting to get things to look right. Like we mentioned, the bezel is a perfect fit so his alterations are hidden behind the tablet itself. He removed the stock head unit and ordered a DIN adapter ki...