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Edge lit zodiac display.

The school I work for runs extra Summer School classes over the summer break here in Japan and all the teachers are given some certain amount of freedom in how they teach the curriculum. Everyone is encouraged to make displays, signs, games etc. Basically let your inner child out and make some cool stuff :)

Part of what I have to teach is the western zodiac. The section in the kids textbook was really lame and everyone knows LEDs make things 100x better so this is what I have come up with... the LED-edge-lit-zodiac-star-sign-display!!

Heres the basic plan:

Finally back online

I had to put my laptop in the shop because the mousepad was screwy and it wouldn't recognize a regular mouse. It's all good and shiny now though. Back to working on Leo.


January 2010 Release of LMR

Just for the historical records....

New release of LMR January 26, 2010:

  • As always a lot of under the hood-work, regarding spammers and security.
  • New content type: "Something else". So many times people have made something great that was not quite a robot. Now it can be published, see front page, Add content.
  • New exciting components-section - try it out on top menu; Components

As always, 95% of the work was done by Del Rudolph. Thank you for your amazing work!

A NXT robot playing tetris

A NXT robot playing tetris.

It uses a DSP board for the image processing and decision making, then uses different colour LEDs to indicate the NXT robot which key it should press.




More powerful oxyhydrogen cannon

I have started to build a more powerful oxyhydrogen cannon for my second mosquito rover prototype, something similar like Estes Hydrogen Fuel Rocket:

Linux on the Propeller

I caught up with Steve (jazzed on the Parallax Forums) last weekend in person - he has been working on porting linux to the Propeller.  Sounded a bit ambitious to me, but he has been working with Heater and they already have Zylin's ZPU processing core up and running on the Propeller - uclinux can be compiled for ZPU - the only thing missing is memory.

Jazzed has been working on that, too - he showed me a prototype he's been working on that expands the Propeller Platform with  32MB of sdram -

3D Printing


Found this online and thought it may be of interest to people on here.


It's a 3D printer you can build yourself. It's a bit beyond my building capacity, but I'll bet there's people on here that can build one.

FIRST Robotics Competition '11 Regionals, San Diego, CA - part 5: Finals and Duckie Damsels

My final installment for this series. I didn't stay to the end but I caught a couple of the final matches and got a souvenier for the memories.

Vid 1: The intros to one of the matches. I think they were waiting for the third red member to arrive so I stopped the camera. When the bot arrived, crew dragging it onto the field frantically, the crowd went crazy. It had no claw, no mini-bot, nothing. A pure defense bot. It was the talk of the pits.

Robot Party - October 6th!

The videos from the October 6th Robot Party are now live! :) You can view them all in this YouTube playlist.


Embedded are snippets from Lenore from EMSL showing the Egg Bots, Eric Relson's Mech Warfare robot, and Che Edoga's humanoid!





Serve and protect

2. Forbidden City

Artoo, we have to protect the empire

Ready for Campus Party

I am ready for the Campus Party.

OddBot was so kind to send me the LMR poster he already had to the Shenzhen Mini Maker Fair.

Sorry for the wrinkles but it's huge and i did not have the space to unfold it completely.

I will bring it to the Campus Party in Berlin in August.

Getting Started with 3D Printing

LMR is a great place to work together, learn and build. When you put cool new tools and tech in the hands of the community here, we can make awesome new things! When I first started wanting to build a 3D printer in 2009, there honestly wasn't much documentation out there to learn from  like today, and lots of my questions were left to the Great Google. Here is an attempt to at least collect some info for those starting on the 3D printing path...

HMOD-1 Update 3

HMOD-1 Update 1

HMOD-1 Update 2

HMOD-1 upper body under construction:


Looking into Klann linkage

Started looking at Klann linkage.  Reversed some dimensions from the patent.  They seemed overly "symetric", likely suboptimal.  I may want to look at running an optimizer on that basic linkage.  Here is an animation of the Klann cycle, done similar to what I have done for Jansen.Animation of a step period with a proposed Klann-like linkage

BoB the Biped and me: We love quiet sunset walks on the beach.

This is just a happy blog about how my BoB is fully mobile and can navigate obstacles. The sensor is just hanging loose but if angled the right way it works fine :) I'm using an HC-SR04 sensor with the newping library for fast distance readings that don't put a big hitch in the smooth walking. I have the library set to timeout the sensor if there is no signal after about a foot or so. Distance readings are only taken while BoB is facing forwards, be it on one or both legs.

BoB the Biped and Me: LEDs, camera, action! (updated)

I finally got a quartet of routines that produce pleasing lighting effects out of BoB's toothless grin. Using CYZ-RGB LED pixels for hardware. If you have any other ideas for light sequences I'd love to hear them, please.

edit - July 14th, 2013

Added test code slightly different that what is seen in the video but essentially the same.

Learning Electronics Via The J5 Obstacle Avoidance Robot

Hello to the LMR community. This first blog post is basically just an introduction for me and what I am about.


YANBO's on hold for now...

Thinking outside the box(es) requires one to identify and solve the real problem. "You've got to free your mind instead..."