A Bluetooth Trackpad From A Resistive Touchscreen

January 14, 2013 by Brian Benchoff 23 Comments

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If you’ve checked out your favorite online retailer of absurdly inexpensive Chinese electronics, you’ll find a whole bunch of replacement parts. Phone parts are especially common, with high-resolution LCDs available for just a few dollars. There are also a few touchscreen kits – resistive touchscreen digitizers that can easily be read with a microcontroller. [Vinod] got his hands on one of these touchscreen digitizers, and with the help of an 8-pin micocontroller turned it into a Bluetooth trackpad.

The clear plastic touchpad is a relatively simple device. By reading a pair of analog values, it’s easy to find the coordinates of a finger or stylus on the touchpad. [Vinod] programmed an ATtiny13 to read these values and turn them in to x y coordinates, but he needed something useful to do with this data.

By connecting a small bluetooth module to his microcontroller, [Vinod] could send these coordinates to his computer. The result is a homebrew touchpad, able to move a cursor around, left and right click, and emulate a scroll wheel.

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This Has Not Been A Good Week For The Hacker Community

January 14, 2013 by Brian Benchoff 29 Comments

RIP

The Internet lost a few great minds this week. [Aaron Swartz], confronted with an upcoming federal trial for his actions in downloading and releasing public domain academic articles from JSTOR, hanged himself this week. As one of the co-developers for RSS, the Creative Commons license, and slew of other works, [Aaron]’s legacy expanded the freedoms and possibilities of the most important human invention since the book.

Perhaps overshadowed in the news by [Aaron] is [Fabio Varesano], the man behind FreeIMU and Femtoduino. He died of a sudden heart attack at the much too young age of 28. The RC helicopter/plane/drone and HCI/physical computing communities lose a great mind with [Fabio]’s passing.

There is talk on the Dangerous Prototypes forum of continuing the development of FreeIMU, a project it seems [Fabio] worked on alone. We’d love to see someone pick up the reigns of the FreeIMU project, hopefully after doing a run of the current hardware and donating the proceeds to [Fabio]’s family.

Putting The BBC In Seattle

January 13, 2013 by Brian Benchoff 57 Comments

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Among great British traditions, there’s tea, knowing how to lose an empire, tea, Parliament, big ben, tea, incalculable wit, Parliament, big ben, tea, and BBC radio. While Britons in foreign lands may not be able receive BBC radio over the airwaves, there is the remarkable BBC iPlayer that allows online streaming of all those awesome BBC radio stations. Unfortunately, moving away from the Prime Meridian means the BBC radio schedule deviates from the schedule ordained by divine right. In Seattle, for example, a Friday evening comedy would be broadcast in the middle of the afternoon. Basically, it’s like listening to Prairie Home Companion on Saturday morning. It just feels wrong.

[Adam] came up with a clever solution to this problem. Yes, it’s really just a Raspberry Pi-powered web radio, but there’s a twist to this build: everything from BBC radio is buffered and time shifted. A program that airs at noon in London will now play on [Adam]’s radio at noon in Seattle.

The hardware portion of the build is an exceedingly British radio which [Adam] deftly modified to include an auxiliary input. The software portion of the build uses ffmpeg, mplayer, and a PHP script to stream the iPlayer audio to a file, wait 8 hours (or whatever the offset from GMT is), and start playing the audio.

In the end, the time shifted BBC radio works perfectly, and even caught the attention of a few people at BBC Radio 4. [Adam] was interviewed about his project, and was even able to listen to his interview several hours later.

Listening In On Weather Balloons With RTL SDR

January 12, 2013 by Brian Benchoff 34 Comments

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Every day, twice a day, over 800 weather balloons are launched around the world at exactly the same time. The data transmitted from these radiosondes is received by government agencies and shared with climatologists and meteorologist to develop climate models and predect the weather. Near [Carl]’s native Auckland, a weather balloon is launched twice a day, and since they transmit at 403 MHz, he decided to use a USB TV tuner to receive data directly from an atmospheric probe.

The hardware portion of this project consisted of building a high gain antenna designed for 162 MHz. Even though the radiosonde transmits at 403 MHz, [Carl] was easily able to receive on his out-of-band antenna.

For the software, [Carl] used SDRSharp and SondeMonitor, allowing him to convert the coded transmissions from a weather balloon into pressure, temperature, humidity, and GPS data.

A Pirate Box For Sharing Files

January 12, 2013 by Brian Benchoff 39 Comments

This is [illwill]’s Pirate Box, the newest addition to the network over at NESIT, the Meriden, CT hackerspace.

A pirate box is a completely anonymous wireless file server, kind of like a wireless version of a dead drop. It’s the perfect device for transferring files at a LAN party or hackerspace. The guts of [illwill]’s portable server comes from an old Fonera router NESIT had lying around. After installing OpenWRT, connecting a few batteries, and finding a wonderful lunch box / treasure chest enclosure on ebay, [illwill] had a portable file server perfect for sharing files.

The pirate box isn’t connected to the Internet. Instead, users can connect to each other and the 16GB USB drive by simply connecting to the router’s WiFi and opening up a browser. All web page requests are redirected to the Pirate Box page, where users can chat and share files. The folks at NESIT uploaded a few public domain files to their pirate box, but they’re anxiously waiting to see what files other users will upload.XVID.AC3.HQ.Hive-CM8.

Finally, TI Is Producing Simple, Cheap WiFi Modules

January 12, 2013 by Brian Benchoff 78 Comments

Ever responsive to the hobbyist market, Texas Instruments is releasing a very inexpensive, very simple WiFi module specifically designed for that Internet of Things.

The TI SimpleLink TI CC3000 WiFi module is a single-chip solution to putting 802.11b/g WiFi in just about every project you can dream up. Just about everything needed to put the Internet in a microcontroller is included in this chip – there’s a TCP/IP stack included on the chip, along with all the security stuff needed to actually connect to a network.

The inexpensive micocontroller WiFi solutions we’ve seen – including the very cool Electric Imp – had difficult, or at least odd, means of putting WiFi credentials such as the SSID and password onto the device. TI is simplifying this with SmartConfig, an app running on a phone, tablet, or PC that automagically takes care of setting up a link in a wireless network.

Best of all, the CC3000 only costs $10 in quantities of 1000. Compare that to other Internet of Things WiFi solutions, and it looks like we might be seeing and easy and cheap way to connect a project to the internet this year.

Hackaday Retro Roundup: Ultraportables Edition

January 12, 2013 by Brian Benchoff 17 Comments

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A few months ago, we rolled out an updated Hackaday, a badly needed new layout replacing the HTML and CSS that had remained unchanged since 2004. Of course a few people didn’t like change and complained about slow load times. We’ve experienced a slightly slower load time as well, so we’ll just wait until the year 2020 when our computers are many times faster and our Internet is provided by Google Fiber. Until then, our pokey battlestations and vintage computers can still check out a few classic hacks on our retro site. Here’s a few retro successes – Hackaday readers who pulled out their old tech and loaded up the retro site – that have come in over the past weeks and months.

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