BREADBOX64 is a twitter client for the C64/128 which allows you to tweet from a real C64 and show your friends timeline. It uses Contiki, a very nice embedded OS, and the MMC Replay cartridge with the RR-Net add on for the physical connection to the net.
This winter I revamped my oldest indoor RC equipment, a few BitCar receivers and a hacked transmitter, to experience some lo-tech indoor fun. If you think about it, this equipment is not so different from the early equipment used at the dawn of the RC flying hobby. Most early RC planes flew rudder only, with […]
Recently I bought a bicycle trailer (remork) to transport my kids to school. As school is only 2 kilometers away and there is always a long queue of cars waiting for the traffic lights, using a bike is actually faster then taking a car. This renewed my interest in biking and off course is a good […]
Inspired by some local guys who fly paramotors on quiet evenings I decided to build myself an indoor paramotor. After some research I came up with a rather simple design for a motor powered paraglider which has a sail of 36cm span and a chord of 12cm. For the carriage I went for a recycled […]
I made a blinkybug today together with my daughter of 5. It is the first time she handled a soldering iron, but everything went well. We’re both very happy with the result and the little creature can live in her bedroom.
Recently I created an extreme feedback device from a LED cube. An extreme feedback device provides a rapid feedback cycle after a commit to the repository. Having a visual clue on the state of the project is very valuable. If introduced correctly it can boost productivity and morale within a team considerably.
Introduction As long as I can remember, I’ve been thinkering with stuff; it started with taking apart toys and later on trying to put them back together as well. One thing, robots have always fascinated me … I always wanted to build one, but never found the time or the right ideas to build one. […]
Here’s my new indoor plane. A 6″ infrared controlled F18 Hornet in the blue angels color scheme. Total weight is 5.5 grams. You can read more in my rcgroups post.
I’m finishing up reading the book ‘Ambient Findability‘ from Peter Morville which is mind bending for me. The subtitle is very catchy and true: “What we find changes who we become”. The book is a journey into the aspects of findability, ranging from search strategies on the web to how human kind built maps to […]
I really liked Neil Gershenfeld‘s book FAB, which talks about the personalization of fabrication. This book discusses a trend in which the power to fabricate things shifts from specialized factories to personal fabrication. Imagine having a small factory sitting on your desk that churns out real-life functional objects, combining construction material with electronics and other […]
After hearing Bruce Sterling’s Emerging Technology keynote about ‘The Internet of Things’, I got interested into the concept of thinglinks, labels for everyday items bringing tagging, linking and searching to the real world. Ulla-Maaria Mutanen, who coined the term has now created an open database where people can create and share thinglinks, making the first […]
The BitESC is a small electronic speed controller for those little RC cars like the MicroSizer / BitChar-G. It can be used in a small RC plane to have some control over the speed of the motor. The speed of the motor ramps up or down, depending on which of the buttons on the transmitter […]
This walking robot is powered by SMA (Shape Memory Alloy) actuators. SMA is also called nitinol, flexinol or muscle wire. Although I knew muscle wire existed for some time, I did not experiment with it because of its high power requirements that are almost not reachable in sub 10 cm robots. After reading about the […]
Killerbee is my first attempt at building a nano sumo bot. These bots have a maximum dimension of 25x25x25 mm and a maximum mass of 25 grams. Killerbee uses a custom build gearbox based on 2 small hobby servos. Its brains are a ATMega8 clocked at 16MHz. Power comes from a 90mAh LiPo battery. It […]
The ladybug uses two motors from a salvaged hobby servos from which the gears were broken. It does not use any gearbox at all, but relies on the small wheels to have a decent speed. I have to say that this approach works and is also used in some commercial (toy) robot kits (velleman running […]
To date, this is my most successful design. It is powered by an Atmel 8535, which means you can write fairly complex applications (8Kb flash). It has 4 tactical sensors, two eyes based on LDR resistors placed in a tube to have directional sensory, one RC5 Ir diode to be able to command the robot […]
This is one of the most unconventional designs I’ve build up to date. It does not run straight, but crawls. The reason for this is that both motors are unidirectional. It uses two wristwatch lavet-type motors as it main actuators and uses two whiskers and two directional LDR light sensors for sensing it’s environment. The […]
This robot is build using small stepper motors that are actually used within the dashboard of VolksWagen cars. I bought them at http://www.didel.com, where you can find a lot of other interesting robot stuff. They don’t generate a lot of torque, but seem to be sufficient to drive a small autonomius vehicle. An other plus […]
The first robot I build, with the next characteristics: slow power hungry expensive useless sensors a lot of fun to build and program The actuators of this vehicle are two small hobby servos, patched for continuous rotation. It uses a tracked driving mechanism, like a tank, in which a third drive wheel and a driving […]