How-to: USB Remote Control Receiver

October 30, 2008 by 126 Comments

Now that we listen to MP3s, and watch XVIDs or x264s, a computer is the entertainment center in at least one room of most homes. Unless you have a special HTPC, though, you’re probably stuck using the keyboard to pause, change the volume, and fast-forward through annoying Mythbusters recaps. PC remote control receivers range from ancient serial port designs (who has one?) to USB devices not supported by popular software. In this how-to we design a USB infrared receiver that imitates a common protocol supported by software for Windows, Linux, and Mac. We’ve got a full guide to the protocol plus schematics and a parts list.

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Asymmetric Gear Heart Sculpture

October 30, 2008 by 33 Comments

[youtube=http://www.youtube.com/watch?v=70dKZjP4NOo]

Here’s a video of a mindbending piece of papercraft engineering. We’d love to see a 3D model for this heart to at least have a starting point when designing our own. The creator’s site is in Japanese though, so it’s hard to glean any insight into his process. Embedded below is a similar cube version. Continue reading “Asymmetric Gear Heart Sculpture” →

Flickering LED Circuit

October 30, 2008 by 16 Comments

Here’s a simple project for your Halloween celebration. The other day while looking through our box of Halloween decorations, we noticed that the incandescent lamp in one of the jack-o’-lanterns was burnt out. Instead of simply replacing the outdated bulb, we decided to build a small dark detecting circuit with 2 yellow LEDs based on this Evil Mad Scientist Laboratories design. After successfully building the circuit, we took the project one step further by incorporating an Atmel ATtiny13 microcontroller. The code switches the LEDs on and off randomly for a flickering effect and is based on this instructable. Below is the schematic we created in EAGLE and a parts list.

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Battle Of The Thumb Drive Linux Distros

October 30, 2008 by 28 Comments

We were expecting eye gouging and body slams, but this review of several thumb drive Linux distributions will do. They compared Damn Small Linux, Puppy Linux, Xubuntu, and Fedora. They don’t mention why they chose these four specifically, as UNetbootin has many many distributions available. They put each through its paces, listing common issues and boot up speed.

Their conclusion was that puppy Linux was preferable as it has a graphically nice interface and the ability to have persistent data storage on the disk. They have a poll going though, so head over and voice your opinion.

Voting Roundup

October 29, 2008 by 31 Comments

[youtube=http://www.youtube.com/watch?v=0Q9NSVUu8nk]

With the election coming up in less than a week, voting machine security (or the lack thereof) is critical, especially with the popularity of early voting this year. While we’ve previously discussed voting machine insecurities, it looks like the problems haven’t been fixed, and in some cases, it’s escalated. Voters in states like West Virginia and Tennessee have complained about voting machines “flipping” their votes, even after they were recalibrated as in the video above. Voters have been advised to avoid voting straight Republican or Democratic tickets, to avoid the likelihood of their votes being flipped. What if you actually do want to vote a straight ticket? Video the Vote is an organization that advises documenting as much of your voting process as possible. Other ways you can protect your vote include voting absentee so that a paper trail is available, and refusing to accept provisional ballots, which are often thrown out. After seeing videos of ROM swapping and finding out that the locks can be opened with hotel minibar keys, we’re waiting to see what’s going to fail this year… and voting absentee.

Swarming Robot Ants

October 29, 2008 by 5 Comments

European researchers in the I-SWARM project are hard at work developing small, autonomous robots that can work together and communicate to perform different functions. They successfully built two types of robots: the I-SWARM, and the Jasmine robots. The I-SWARM robots are three millimeters in size, are powered by a solar cell, and move by vibration. The Jasmine robots are the size of two-Euro coins, have small wheels, and are powered by battery. These tiny robots have several advantages over their bulky predecessors, such as high redundancy, greater flexibility, and the ability to manage tough terrain. They could even be used to repair larger robots. They also come with distinct challenges. Because of their minuscule size, programming memory is necessarily limited, and the team had to come up with special algorithms to manage and control the machines. Though they haven’t been able to meet their goal of making a thousand of them, the researchers are hopeful and confident about their abilities to mass produce the robots cheaply.

[via io9]

Tesla Turbines For Fun And Profit

October 29, 2008 by 19 Comments

[youtube=http://ca.youtube.com/watch?v=aoRh8T_VX-Y]

[Rick] has been building Tesla turbines in various ways and posting his projects to youtube. For those who are unfamiliar, a tesla turbine is a fanless turbine that uses a smooth central disk spun by friction from a gas or fluid. Since the turbine itself has no protrusions, it is extremely stable. There are lots of other benefits, which can be explored on the Wikipedia page. [Rick], as you can see from the video above has found several uses for them, from Halloween props, to generators for lights, to an automated shake flashlight shaker, you can even watch him rev one up to destruction. Though most of these are at relatively low speeds, he has shown that he can make one from CD spindles that is stable enough to reach 10,000 RPM. [Rick] admits that all they really do is spin fast and make cool noises, but they do that pretty well.

Update: Moments after this was published, we found an instructable by [Rick] on how to build a blender using a tesla turbine.