[Niclas] sent us his home made tube amplifier. For the case he used a computer power supply unit, took out the guts and replaced them with the amplifier board. He based this build off of an existing design but took a more minimalist approach. The wooden face plate has an on/off switch, an audio jack, and volume control. Apparently, the tubes are floating loose inside of the case. We’d recommend a more secure mounting method for these delicate parts.
[Kevin] sent in his almost finished open source dot matrix clock. Sporting a hefty 40 x 16 display powered by a PIC 18F he has complete pixel by pixel control of the graphics. Combined with with a triple buffer he is at least able to output 15fps, with planned 30fps. While this has great potential for a clock, what about going further? Twitter updates, chat messages, weather updates, the current airspeed velocity of an unladen swallow; it will be tough to beat the competition without some more features. Either way, its an awesome project and we can’t wait to see it completed.
[youtube=http://www.youtube.com/watch?v=0hoFxx1EaN8]
[GuySoft] sent in this project. He doesn’t normally mess with electronics, but decided to give it a try. He chose a fairly complicated project to be his first, but seems extremely comfortable with it. This project was to control his R/C car with a pic16f84. That chip was chosen simply because it was the only one available at local stores. Though we’ve seen much more complicated projects in the past, he does a great job of showing exactly what has been done. He shares his thoughts and source code with us as well. He has express a little frustration about the closed source compiler he was using, so if anyone has any suggestions for him, he would probably appreciate it. The funny part is that he mentions that people would just tell him to “get an AVR”. We think the readers here will probably be happy with how he pulled it off.
![article-1212214-0659F596000005DC-336_468x324[1]](http://hackaday.com/files/2009/09/article-1212214-0659f596000005dc-336_468x3241.jpg "article-1212214-0659F596000005DC-336_468x324[1]")
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.
We were momentarily excited when we heard that CableCARD compatible tuners will be available for purchase by the end of the year. A card like this would allow you to hook up your digital cable to your computer and record programs natively. This has been possible for a long time with analog cable and PVR software such as MythTV. Up to this point, recording digital cable has required a dedicated cable box and workarounds to allow the computer to change channels.
Wait a minute though, the announcement was made by Microsoft? Indeed. Microsoft has been making a big push into the home theater PC market with Media Center. Redmond’s PVR offering is also limited to recording analog television;opening up digital would expand the marketplace for them. But here’s where it gets hairy: if you read the Microsoft announcement, TV shows flagged as CF (copy freely) are the only ones that can be recorded.
So, if we have this right: you shell out money for a new tuner then you pay more for the rental of the CableCARD. Both of these expenditures are on top of a digital cable subscription. And yet you can only record shows marked with a “Copy Freely” flag. Who makes the decision on which shows we can pay to record?
[youtube=http://www.youtube.com/watch?v=ThMd9YR1MAg]
[Andrius] just sent in his robot Rubik’s cube solver. It isn’t as fast as the solver we saw last year but it also doesn’t require as many parts either. This project utilizes two claws, each actuated by just two servo motors. The thinking is done by a PC which calculates the necessary moves to solve the cube. Each instruction is then passed via USB to the AVR ATmega16 microcontroller that is responsible for the servo operation.
Right now it looks like the colors for each starting face have to be entered manually before a solution is calculated. We think [Andrius] is probably planning to upgrade this with the next generation of his software as he already has a webcam setup for this type of analysis.
[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.
