We’ve covered weed whacker bicycles before and you can even buy 66cc conversion kits now. [geoff390] posted a few videos over on YouTube about another motor option. In the first video embedded below, he goes over the basic parts of his bike. The chainsaw motor is mounted to the side of the back tire and a metal drive wheel extending from the chainsaw shaft makes contact with it. The motor assembly is mounted on a hinge and the friction between the drive wheel and the back tire is adjusted with a turnbuckle. He posted a more detailed second video in which he goes over some of the finer details of the bike and some of the issues he’s had. Read the rest of this entry »
[Michael Davis] sent in his homemade laptop tray. He does a lot of traveling in his Toyota Tacoma and was looking for a good way to mount his laptop inside. Unfortunately, [Michael] soon discovered that commercial laptop trays can be very expensive and difficult to install. He saw an opportunity in the empty cup holder in his car. Fifteen dollars worth of PVC pipe fittings and a piece of plywood later he had a laptop tray.
Strobit looks like it could be a project to keep an eye on. The entire project is open source, including the hardware. The aim is to build a low cost, low power, wireless enable arduino powered widget. This seems like it could really cut down on the development time of many projects we’ve seen here. Development is still ongoing but it looks like they’ve already implemented some mesh networking similar to the zigbee systems.
This project provides an opportunity to conduct near space experiments. The flight computer, BalloonSat Extreme, is controlled by a BASIC Stamp 2pe. The complete BOM with PCB artwork is provided. There is enough hardware to control cameras, servos, a Gps, and five digital I/O. The computer is also equipped with a 12 bit ADC to log experiment results. The device seems limited to 30KB of storage. Though the author suggests this memory limitation is more than adequate, we are wondering if an implementation of the Nyquist sampling theorem is in use at all. For further reading the author has provided information regarding Amateur Radio High Altitude Ballooning.
has put together this interesting project involving aluminium can recycling (translated, sortof). They’re using an arduino to tally up how much aluminium they have accumulated. That information is then passed on and displayed on a google map. There are families that go around collecting the cans as a means of income, and this system could be very helpful to them. They state that their goal is to eventually have restaraunts and more families included. We’re a bit curious about how helpful this really is. How is that information actually changing the actions of the collectors? Would a simple flag on your door or window signalling enough cans to pick up or not be just as effective?
Researchers at UC San Diego have been working on a robot that learns facial expressions. Starting with a bunch of random movements of the face “muscles”, the robot is rewarded each time it generates something that is close to an existing expression. It has slowly developed several recognizeable expressions itteratively. We have a few questions. First, are we the only ones who see a crazy woman with a mustache in the picture above? Why is that? What makes [Einstein] look so effiminate in that picture? Secondly, what reward do you give a robot? You can actually see this guy in action in a video after the break.
Maxim’s iButtons, which are small ICs in button-sized disks, are starting to show up in more and more places. They have a range of uses, from temperature loggers to identification, and all use the 1-wire protocol to communicate. Over a furrtek, they hacked an iButton used for buying things from vending machines and created an infinite money cheat. They built a small rig based on the ATmega8 to read and write data to the chip. The data was encrypted, so it wasn’t feasible to put an arbitrary amount on the card. Instead, they used a similar technique to the Boston subway hack and restored a previous state to the iButton after something was bought. They also created a hand-held device to backup and restore the contents of a button for portable hacking.
Using an MSA-T MIDI Decoder from Highly Liquid, [Rob Darman] was able to take the MIDI output of his Roland V-Drums and use that output to control fire shooting cannons, forming a setup that he calls fire drums. As seen in the video above, the response time between the V-Drums and the fire drums is pretty impressive. While this is by far one of the coolest things that we’ve seen controlled by MIDI, we’re naturally thinking about taking this to the next level; MIDI-controlled fireworks, anyone?
It seems that our french friends over at BlogEEE.net have gotten their hands on a prototype of the Asus EEE Keyboard all-in-one keyboard computer. After plugging it in and messing around it a little bit, they decided to take it apart. Although BlogEEE.net is in French, we were able to learn several things about this prototype. According to the site, the PCB in their EEE keyboard is marked as Revision 1, meaning that it is very possible that this could be the finalized version of the PCB that will be seen in retail units. Also, they mention the presence of a Silicon Image sil1392cnu, a chip responsible for sending HD graphics via the EEE’s onboard HDMI port, supporting resolutions anywhere from 480i to 1080p. Perhaps one of the most impressing details uncovered was that when weighed the EEE keyboard clocked in at an impressive 2.1 pounds, lighter than most keyboards that don’t have an onboard CPU or display. While we’ve learned a lot about the Asus EEE Keyboard so far, there is still no information available regarding its release date.
For those who watched the Tour de France, you may have been pleasantly surprised to see some cool tech. Nike was using a robot to paint pictures on the street in chalk dot matrix style. It was accepted by the general public as new and innovative, as well as generally cool. In the hacker community though, a bit of trouble began to brew. The Chalkbot bears more than a passing resemblance to a project called GraffitiWriter. GraffitiWriter was a bot initially designed to protest the militarization of robotics. As it turns out, one of the early developers of the GraffitiWriter is behind the Chalkbot in a legitimate contract. The trouble doesn’t seem to be one of intellectual property legalities. People are mad at the corporatization of public work. They want kids watching to know that this system was designed by regular people in their spare time at their homes, not by a team of researches in a secret underground Nike laboratory.
The article takes a bit of a turn and talks some about the possibility of projects being taken and used for corporate advertisement. The specific item they are talking about is the Image Fulgurator which secretly projects images on objects in your photographs. You’ll have to go check that one out to see how it works.
Some companies insist on using proprietary pieces. It can be really frustrating when there is no apparent reason other than consumer lock in. It irritates us to feel like we’re being forced to buy their pieces. This is one of the more popular reasons listed when you ask a hacker or modder what got them started. This project takes us through making a normal power supply work with the compaq proprietary 14 pin plug found in some smaller desktop PCs.
Aside from the plug itself being different, the motherboards require a 3.3v standby voltage. A normal power supply usually only has a 5v. Though there are even simpler ways of bypassing the issue, he chose to put an inline voltage regulator. Schematics are available on the site.
These 15 ton robotic arms can reach 16 meters. Not content to control them by a simple joystick, the team hacked together WiiMote controls for them. Ok, we get it. Everybody loves the Wii. What is different about using the WiiMote in this scenario? You can see that they are only using the pitch, yaw, and roll. They’re not utilizing the tracking aspects at all. The only difference between the WiiMote and their joystick in this scenario is that the WiiMote connects via bluetooth. Frankly, we just like the fact that people are playing with the robotic arms, WiiMote or not.
When [Tom] got tired of the large size of his Microsoft Comfort Curve 2000 keyboard, he decided to hack a recently acquired Apple Adjustable Keyboard for use with Windows. After removing the ancient ADB based control board from the Apple keyboard, he was able to map the keys and transplant the Microsoft keyboard’s USB control board into the Apple keyboard. After soldering the control board into the keyboard with old IDE cables, all that was left was to add some diodes to prevent ghost key presses, and the keyboard hack was complete. [Tom] offers a spreadsheet of the results of his key mapping on his site, and while you’re there be sure to check out his other projects, like his DIY Proton Pack that he made for Halloween last year.
