Router/Twitter/Arduino Clock

ledclock

[Kyle] decided to build the above LED clock for his church. Though it may look impressive enough, it is also hiding loads of features. [Kyle] wanted to make the clock as easy to control as possible, so rather than use buttons or dials to control what is being displayed, he used Twitter. The clock is connected to the internet through a Linksys WRT54GL. The router was hacked so not only does it supply the connection to Twitter, it also parses all of the replies the clock’s feed gets. The clock responds to commands to turn it on or off, run a countdown before service, display the number of viewers on the church’s live stream, and display a sequence of numbers. The time never needs to be set, as it is synched from the internet. The circuit for actually driving the display is based off a PIC, but it was changed to run off an Arduino.

DIY Lincoln Welder Conversion

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

[Fritz] built this 600 joule capacitive discharge spot welder in a case scavenged from a Lincoln plasma cutter. All of the circuitry was designed by [Fritz] and the schematics are available on his website. He has a few other welding related project also documented on his site that are worth checking out. While this isn’t the first homemade spot welder we have seen, it is definitely the first one with a case mod. If you are not up to the challenge of building one quite as complex as [Fritz]’s example, a microwave can be used as the donor appliance in simpler designs.

Homing Pigeon Email

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Yes, you read that correctly: electronic mail carried by birds. [Ferdinand] tipped us off to this story, which involves combining new and old methods in transferring data. The Unlimited Group, a firm in a remote section of South Africa, transfers loads of encrypted documents to a second office 50 miles away. A pricey broadband connection would take between 6 hours and two days to transfer a standard load (4GB) of data between these locations. On the other hand, Winston (seen above) can complete an equivalent flight within 45 minutes. A memory card is strapped to his leg, and using his wit and instinct, Winston finds his way home. For those without their calculators on hand, Winston’s bandwidth is between 7x and 63x faster than what they had before. If his flash card were to be upgraded to 16GB, that would be an instant fourfold increase on top of current gains. As [Mark] pointed out on the Daily Mail website, homing pigeons still need to be taken back to their departure point.

This solution still has its advantages over a courier: they are lower in cost, they work over longer hours, and have potentially faster delivery speeds. Multiple pigeons can be transported back at once, and released with data as needed.

Linux (via ILoader) Out For Nano 2G

Iloader

[Linux4Nano] over at the [Gna! repositories] have just finalized a breakthrough for their bootloaderproject.  Because the iPod Nano 2G has a hardware encryption chip, it could previously not be flashed with a custom firmware. By digging around in some assembly code (and working their magic) the team was able to get Linux onto the 2G, develop drivers for its peripherals (screen, clickwheel and serial interface are a few), and put all of that code into a package convenient to install by the end user. If you’ve ever considered installing uClinux (the ported distro) on your Nano, the [Linux4Nano] team have made the iLoader an easy place to start.

Update: Closer inspection yields that the iLoader is not yet able to load uClinux onto a 2G because it has not been ported. However, it can reload it with other custom firmware which is still a solid breakthrough.

Uzebox Video Player

[youtube=http://www.youtube.com/watch?v=hWWsSn_QKLM]
Everyone’s favorite open source game console, the Uzebox (also cloned as the Fuzebox), just got a new feature hacked into it – a video player. At reduced quality (8-bit color), the Uzebox was able to play ‘The Matrix’ off an SD card @ 30fps plus the audio @15kHz. That’s a pretty impressive feat when one considers it is running on 4096 bytes of RAM. The video file had to first be converted into a series of pictures through a Photoshop macro in order to be playable. A Uzebox can be built with little more than a few resistors in addition to an overclocked ATmega644P, and AD725 (which has been skirted in certain incarnations).

12kW Solar Collector

[youtube=http://www.youtube.com/watch?v=jTvAL7ty53M]

Though not much info is readly available about it on the web, [Joe Carruth] is trying to build publicity (and venture capital) for his home-built solar electric generator. At its essence, it is a Stirling dish system with an adjustable composite mirror surface. This means that instead of having to rotate the entire contraption in order to follow the Sun, [Joe] only has to make  the mirror segments pivot. A Stirling steam engine at the tip converts the energy into the movement used to generate electricity. Solar power plants (or ‘farms’) that are emerging are beginning to consider the advantages of using more efficient Stirling dishes rather than less efficient solar panels. If anyone has an idea as to how [Joe] can automate sun tracking for the mirrors, please post it in the comments. A couple more videos on the topic (in general) are available below: Continue reading “12kW Solar Collector”

Hard Drive RGB Clock

[youtube=http://www.youtube.com/watch?v=XK9en2H7rBA]

We’ve brought you an HDD clock in the past, but [mb1988] tried to bring his project to another level by fully documenting it (in Polish). Inspired by [dzgdzzh]’s version of the same invention, [mb1988] decided to reverse engineer it (as well as make a few changes) and base it on the powerful ATmega128. Since this clock, along with most HDD clocks, can only display solid lines of radii, it cannot be used to display text. However, color schemes and animations can be toggled using a remote control. The housing itself is also pretty impressive. The back part of the enclosure was molded out of Rayobond, while the front was simply the original HDD case but spray-painted black and etched with some original artwork. The source code, schematics, and PCB layouts are freely available to download on the project’s thread, but you will have to login to the forum to  access them.