Let's Make Robots!
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Voltage comparators are very useful components that does just what the name tells you: it compares voltages (duh!). A voltage comparator can be seen as a … Read more
If you're ever in need of additional digital inputs or outputs then this chip may be an answer to your prayers. It only requires two connections from your … Read more

AVR is in the house!

Last week I purchased the AVR ISP mkII programmer for the Atmel AVR series of chips and I had previously bought some ATtiny26 chips for use in motor controllers, line sensors, etc.

Crawl around, line crawling
Using a
This is just a strange thing that crawls around using its "arm". My ultimate goal is to add CMUCam3 and get the thing to follow some objects by crawling towards … Read more

New stuff to play with (oh joy oh joy)

Today I received my CMUCam3 which is a small ARM7 based thingie with a camera and 4 servo connectors amongst other stuff. I'm hoping to get some time to dig out my old image processing books and make some interesting stuff. Would be nice to have something follow the cat around and give him some exercise :-)

I'm amazed at how small the board is. I think it is actually smaller than the picaxe 28x dev board - of course it is higher since it has a sub board with the camera attached to it.

First off I'm no expert but I have gotten a bit wiser about what resistors are good for and how to find the right ones for a specific purpose. I will tell you about … Read more
This is meant as a platform where I can put a laptop and a webcam and then let the laptop control the NXT brick via usb or bluetooth from C++ code. The main purpose … Read more

Stanley from DARPA challenge

Yesterday I went to the danish exhibition that is featuring Stanley - winner of the DARPA desert challenge some years ago (2006 maybe).

Now that's an awesome robot with some fancy equipment! I think it had 5 or 6 laser range finders on the roof constantly scanning the profile of the road in front of it and mixing this together an image from a camera on the roof of the landscape far ahead in order to recognize flat surface for driving on. It is based on some sophisticated machine learning algorithms so that it can adapt and learn from what it sees with its sensors

Will this motor driving even work?

Hey guys!

fritsl had a blog post about motor driving and h-bridges and it seemed what he basically needed was to "flip the voltage" and get the motor to change its rotation the other way around.

Bad robot!

Today was the qualification round of DTU robocup. My robot did not do very well at all - it tied with 7 others for the last place - getting 0 points!

When testing the robot on the robocup track the first thing that was wrong was that the lighting was so bright, that the sensors were all fully saturated all the time and thus couldn't see the line. That problem was somewhat solved by adding a lot of cardboard and tape plus some clothing on top to keep the light out.