Let's Make Robots!

theo jansen

Navigate around via ultrasound or controlled by bluetooth
Using a
Inspired by this one: http://www.instructables.com/id/Strandbot-a-solar-arduino-powered-RC-motorize/ Autonomous walker, based on a model of the strandbeest. This … Read more

Issues with Jansen Linkage

There are two main concerns I have with the Theo Jansen linkages, which have shown up in rough prototypes.

basic drawing and node naming for main linkage

walk gracefully under wind or other power
This is a mm scale model of Theo Jansen's Strandbeests suitable for printing with RepRap 3D printers - a work in progress. Update April 2012: Finally, I finished a … Read more
Eats wind, waltzes outdoors
If you need to know more than is in this video,  you will probably be interested in everything tagged "theo jansen". Just click it. Yo know you want to! This … Read more
Obstacle avoidance via Sharp IR
Using a
Update: I’ve had a nice breakthrough in the leg mechanisms for K’nexabeast.  The motion is now much stronger and closer to Jansen’s ideal curve.  Read more

Gakken interview - for the record

Dear Rik,

Thank you again for cooperating in our magazine.
(And also for introducing about us in your blog too!)

Following is the questionarie that I want you to ask about your Theo Jansen style robot leg.

Animaris Ordis Parvus

So here's the whole story (so far).

In Japan people are crazy about Theo Jansen's art. To find out more about Jansen's creation, start here or browse the LMR pages tagged "theo jansen". Several exhibitions of his art have been organized in East Asia before, including Japan. Jansen even holds a special Japanese website or two.

Big in Japan?

Google and Youtube keep haunting me for my dead projects. Today I was found by an editor for Gakken's magazine "Otona no Kagaku" (Grownup's Science). The magazine's upcoming January issue will have a Theo Jansen theme. Jansen apparantly is very big in Japan. The magazine includes a miniature, wind powered model of a strandbeest.

The Pulse - 2009w39

LMR on the Brain
Sensing the living LMR community since 2008w43.


Remember kids: once your robot is posted on LMR: it stays there. For ever. Come next Christmas, Pesach or any kind of New Year, LMR will still be hosting the pictures your shot, the video you edited and the very words you wrote.

Here is a large prototype of a robot inspired by the Theo Jansen walkers.  The four legs are controlled by servo and interfaced through a Parallax server … Read more

Almost a robot page worth


My Theo Jansen Walker is getting closer and closer to a robot-project-page-worthy machine/creature. The port side is now complete but not finished.

Complete in the sense that I have all components designed, purchaged, built and even assembled. Not finished in the sense that it will not move! Hence the lack of video. Photographs will have to do.


More Theo Jansen, plus another dude

Robots.net has a pointer to a new video (to me anyway) and an audio podcast from robotspodcast.com that features Theo Jansen, as well as another robot builder I'd

TJ snow angels and pulley kebab


Today I decided on the arrangement of my Theo Jansen legs on the side of my future robot. I place one prototype on a piece of cardboard and traced the outlines with the legs in all possible positions. Like a robotic snow angel. This way I know what the "footprint" of the entire mechanism against the side of my robot will look like. And if one leg will hit a neighbour when flailing about.


I've spent quite a bit of time on the mechanical design on this robot, maybe more then was strictly necessary since I used this opportunity to learn SolidWorks, and … Read more

Jansen Walker Toy (sized) Bot

Hello everyone,

This is my first post here, don't be rough.

I stumbled on the this site about a month ago while doing research on a bot i'm building that's similar to Rik's current Jansen Leg project, that's actually what I was searching for when I found the site.

Anyway, I wanted all of you input on my project, my version uses a similar leg design and I'm curently planning on powering it with two servos and an Arduino-clone.


Theo Jansen legs - possible applications

Here is an open invote to all of you to join yet another Shoutbox debate. Oddbot and I are both thinking of ways to mount a vehicle, or creature, on Theo Jansen legs. (use the search box)

Most creatures living on the 'net have two sets of three legs. Each set on a side. In the front and in the back. Many creatures I saw even double up on the legs: six in front, six in the rear. All connected to the same crankshaft in the center of the creature.

See the original Transporter or  Animaris Rhinoceros

Theo Jansen style robot leg: prototype #10: forget about brass!

Getting closer and closer. Today I needed to clear my head. I really were dreading mass producing my legs with all those brass pivots. During a nice walk in the sun, I figured I would try 10 mm beech smooth dowel rod.

[This photo links to my Flickr set with many more details.]




Theo Jansen style robot leg: prototypes #8 and #9, I suppose

My Theo Jansen Leg is finally starting to become something reproducible. Every step in in this arduous journey has been aimed at reproduction. No robot needs just one leg. And also, I wanted to share my design with anyone who fancies a walking Strandbeest robot.

Update 25 feb 2009: New video demonstrating the first powered test. Maybe that should read overpowered test...

(The ugly green screens are an editing artifact. Imagine beatiful fades.)


 Hi all,

You probably read my blog and know I am working on a design for robot legs inspired by the legs of Theo Jansen's Strandbeest.

Below is a picture of a plywood prototype on its way to become version 6.

Theo Jansen style robot leg: prototype #6

(continued from here)

I am busy with the tweaking and fine tuning of my plywood version of prototype #5. I had no idea this would turn into a different design I now call #6.


This photo shows #6 in its leftmost position. It just cannot reach the extreme. There are still several small bits of plywood touching that should not be touching. Again with the jig and with the saw!


Theo Jansen style robot leg: prototypes #4 and #5

Continuing where I left off (after a stiff binary interruption)...

This picture compares prototype #2 with an angled profile version:



The angled "L-profile" introduces a new property in the design: chirality. All of a sudden, it matters which direction you want to fold the joints. Compare the symmetric #2 on the right:

Theo Jansen style robot leg: prototype #2 and #3

I started tinkering with "Theo Jansen legs" again (follow the link first if you don't know what that means).

I am prototyping in corrugated cardboard and trying to come up with a design that could be produced in large numbers (six at least) in plywood.


Theo Jansen style robot leg: prototype #1

For my dreamed symbiotic robots, I am looking for an alternative locomotion. For the passive robot (the trailer) anyway. The active tractor probably needs tracks. I heard Theo Jansen say on TED (improving on the wheel, 4 minutes into the video) that his design for a legged creature is (theoretically) more energy efficient than wheels or tracks.