You’ve probably heard about NFC but what is it, you ask? NFC (Near Field Communication) is an extension of RFID (Radio Frequency Identification) but with a purposefully decreased range. I know, why would you want LESS range? Mostly for security. You see, it’s common to think that RFID tags need to be right next to a reader before they register. In lots of cases this is true, but you can “shoot” a radio signal at an RFID tag or purchase a long range scanner to read it if from a distance. Since NFC is limited to a maximum of around 4 inches, it’s much more difficult for anyone to get your information without you knowing. This makes it a great technology to use for touch-less payment, door entry, or anywhere else that security is a consideration.

This NFC Shield for Arduino (available in the Maker Shed) is a great way to experiment with NFC and other 13.56MHZ RFID applications. The shield can be used it to not only read tags, but to write them as well. It can even “act” as an NFC tag for bi-directional communication with NFC equipped cell phones and tablets. The NFC Shield uses I2C or SPI for communication to minimize pin usage, and the antenna design improves reception and allows you to stack shields on top of it. The kit includes header pins (a little soldering required) and one writable MiFare 1k 13.56 MHZ NFC card. Since one card isn’t too much fun, we also have an assortment pack of 6 writable, 1KB tags available.

If you prefer reading your RSS feeds without the backlight, there's hardware for that, and if you'd prefer not reading your Twitter feeds at all, there's now hardware for that as well. Mix an Arduino Ethernet board, an Emic 2 Text-To-Speech Module and the knowhow to put them together, and you've got SocialChatter -- a neat little build that'll read your feeds aloud. The coding's already been done for you, and it's based on Adafruit's own Internet of Things printer sketch with a little bit of tinkering so nothing's lost in translation. If your eyes need a Twitter break and you've got the skills and kit to make it happen, head over to the source link for a how-to guide. Don't fill the requirements? Then jump past the break to hear SocialChatter's soothing voice without all the effort.

Continue reading Arduino-based SocialChatter reads your Twitter feeds so you don't have to (video)

Filed under: Misc. Gadgets, Internet

Arduino-based SocialChatter reads your Twitter feeds so you don't have to (video) originally appeared on Engadget on Thu, 16 Aug 2012 11:58:00 EST. Please see our terms for use of feeds.

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.

OLED Lego train station emerges from Adafruit and Arduino gear, minifigs to get home on time originally appeared on Engadget on Tue, 26 Jun 2012 00:07:00 EST. Please see our terms for use of feeds.

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Fijibot is an autonomous, self-charging photovore. I built him using a 1.5 liter Fiji Water bottle, an Arduino Uno, 6v solar panel (plus various other parts) from Radio Shack, an Arduino Proto Shield (plus various other parts) from Adafruit, and the wheels and steering arrangement from an RC car.

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Unless you've been hiding under a rock lately, we're pretty sure you've heard about the Raspberry Pi by now -- a $25 credit-card sized PC that brings ARM/Linux to the Arduino form factor. As a refresher, the system features a 700MHz Broadcom BCM2835 SoC with an ARM11 CPU, a Videocore 4 GPU (which handles HD H.264 video and OpenGL ES 2.0) and 256MB RAM. The board includes an SD card slot, HDMI ouput, composite video jack, 3.5mm audio socket, micro-USB power connector and GPIO header. Model A ($25) comes with one USB port, while Model B ($35) provides two USB ports and a 100BaseT Ethernet socket. Debian is recommended, but Raspberry Pi can run most ARM-compatible 32-bit OSes.

This past weekend at Maker Faire Bay Area 2012 we ran into Eben Upton, Executive Director of the Raspberry Pi Foundation, and took the opportunity to spend some quality time with a production board and to discuss this incredible PC. We touched upon the origins of the project (inspired by the BBC Micro, one of the ARM founders' early projects), Moore's law, the wonders of simple computers and upcoming products / ideas -- including Adafruit's Pi Plates and Raspberry Pi's own prototype camera add-on. On the subject of availability, the company expects that "there will be approximately 200,000 units in the field by the end of June". Take a look at our hands-on gallery below and our video interview after the break.

Gallery: Raspberry Pi hands-on

Continue reading Raspberry Pi hands-on and Eben Upton interview at Maker Faire (video)

Raspberry Pi hands-on and Eben Upton interview at Maker Faire (video) originally appeared on Engadget on Mon, 21 May 2012 06:21:00 EST. Please see our terms for use of feeds.

Becky’s latest project over at adafruit shows off some of the possibilities of the cool surplus vending machine coin acceptors they just added to their catalog. It has an Arduino for brains, an LCD shield to report your balance, and an LED that makes piggy squeal glow when you feed him teh monies. The more loot in your hoard, the brighter he glows. And of course it’s done with the usual sparkling clarity and attention to detail that Becky brings to all her videos.

I have to say, looking at those coin acceptor modules has me scheming one of those machines that trains birds to trade coins they find on the ground for food. [Thanks, Becky!]

How-To: Electronic Piggy Bank

Continue reading Live your life like there's no tomorrow with David Lee Roth in a box (video)

Live your life like there's no tomorrow with David Lee Roth in a box (video) originally appeared on Engadget on Thu, 22 Mar 2012 15:44:00 EST. Please see our terms for use of feeds.

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Knowing the length of each string and the distance between the servos gives us everything we need to use trigonometry to find the XY coordinates of the pen.  We can also do the reverse, which means we can find how much to change the strings to move from A to B. From there I added gcode support.  Lastly I wrote some Java apps to create a nice GUI.  If your arduino comes with the firmware already loaded then you don't even need to install the Arduino app. :)

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Continue reading Adafruit's Internet of Things Printer combines your love of information, receipts

Adafruit's Internet of Things Printer combines your love of information, receipts originally appeared on Engadget on Wed, 22 Feb 2012 19:01:00 EST. Please see our terms for use of feeds.

Continue reading Adafruit Flora lets you wear your open-source love on your sleeve

Adafruit Flora lets you wear your open-source love on your sleeve originally appeared on Engadget on Fri, 20 Jan 2012 13:57:00 EST. Please see our terms for use of feeds.