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News: Door Locked? Send a Text Message & Open Sesame

When choosing a security system for the office, Billy Chasen decided to ditch the traditional lock & key barricade for something a little more 21st century. He hacked together a device that uses a web server, servo motor and some parts from Home Depot to enable locking & unlocking via text message. Chasen maintains a list which gives access to green lit office workers, who enter by simply texting "lock" or "unlock"... and voilà, open sesame.

How To: Convert Your LG Optimus G into a Google Nexus 4

Since the introduction of the Nexus 4 to the Google Play Store last November, the phone's been in constant demand thanks to the low price and sleek design. Even today, the phone is still listed as sold out. LG's Nexus 4 is also the only smartphone in circulation that can run a naked version of the Android operating system; one that does not come loaded with a manufacturer UI running over top of it.

How To: Build a Radio Controlled Watermelon Air Boat

There are tons of remote controlled cars and boats out there that you can buy or build, and you can add remote control functionality to almost anything. But if you really want to stand out, there are few things more attention-grabbing than this radio-controlled watermelon boat by the folks over at Starting Electronics. The body, obviously, is made from a hollowed out watermelon with a propeller and the parts from a remote controlled airplane mounted on a wooden block. A servo allows the prope...

How To: Use a multimeter

Learn how to use a multimeter. Multimeters are amazing measuring devices that are an absolute necessity for anybody who wants to works with electronics. However, if you don't know how to use one, you might as well not have one, a problem this video remedies by teaching you various measuring methods and there purposes.

How To: Hack into encrypted computer data

Xeni visits the offices of the Electronic Frontier Foundation and speaks with Jake Appelbaum and Bill Paul, two of the authors of a security research paper that shows how your computer's memory can be tricked into revealing data you thought was safely encrypted, and out of the reach of others. Hack into encrypted computer data.

How To: Build a handheld version of the TSA's microwave-based body scanner

With the TSA's full-body scanners occupying a great deal of airports nationwide, the debate remains as to whether air travelers should continue to be subject to immoral security techniques and possible health risks due to the x-ray scanning devices. The "advanced imaging technology" may help keep obvious weapons out of major airports, but scanning naked bodies seems more voyeuristic than crucial to national security. But while the argument continues, one woman is taking a stand… well, not rea...

How To: Make a Toilet Paper Launcher

Shoot streams of toilet paper in midair with this ultimate TP machine, the Streamerator. Take a look at this instructional video and learn how to make a toilet paper launcher with a generic, electric yard blower. This gadget is extremely easy to make. First, you need a steel rod about the same length as the blower, the rod has to be bent at 90 degrees. Two ground clamps are used to mount the steel rod which will serve as a roll holder. A flat punched piece of metal is measured and screwed int...

How To: Hack together LED candles

Ah, the alluring glow of the LED light. Whether you're looking to create a bit of romantic (albeit extremely geeky) ambiance, or you just want to have some extra emergency lighting around the house, a set of mini LED candles is a great thing to have. They also happen to be quick, easy, and cheap to make yourself. In this video, executive editor Mike Haney demonstrates how to do it.

How To: Wire a 555 timer chip for PWM

This demonstrates how to wire a 555 timer chip for Pulse Width Modulation. Items used: solderless breadboard, 555 chip, 510 ohm resistor, 100k ohm variable resistor, 1 RGB LED at 20-25ma, wires, and 9v battery. And those vertical lines are what i mean in terms of what you can see only on the camera. You can see the led light of course without the camera.

News: Hacked Kinect Captures 3D Video in Real Time

That Kinect you bought for your Xbox 360? More than just a game controller, it's a bonafide hologram generator! In the clip below, UC Davis researcher Dr. Oliver Kreylos demos the process. The fun stuff begins at the :44 mark. Kreylos explains, "By combining the color and the depth image captured by the Microsoft Kinect, one can project the color image back out into space and create a 'holographic' representation of the persons or objects that were captured."

How To: Make a light bulb glow with an electrical circuit

One of the basics of electronics is knowing how an electrical current works. For this video, you will need a 1.2V battery, a lightbulb, and 2 copper wires. First, take the wires and attach one end of each wire to opposite sides of the battery. Have a friend hold the wires there, or tape the wires down. Then, take the unattached ends of the wires. Take one wire and touch it to the upper part of the base of the lightbulb. Take the other wire, and touch it to the bottom. The lightbulb should now...