ROBOTMAK3RS Blog

Vassilis, better known as NeXTSTORM made a cool short movie enjoy! Martyn

Have just returned from LEGOWORLD 2010 in Zwolle. With a lot of fantastic people from the MINDSTORMS community around, it was a great experience : Note that for some reason, I did not even catch all of the intriguing and brilliant creations on film that could be seen at the MINDSTORMS booth.

This Checkout Scanner project I posted recently uses the NXT 2.0 Color Sensor in Light Sensor mode to scan simple "barcodes" made out of LEGO beams and imitate a laser barcode scanner. The interesting thing is how fast it is able to work (the standard light sensor would be as fast as well). Here is a video of the scanner in action: This project was inspired a bit by one of the missions on the FLL board this year, the Medicine Dispenser, where teams might want to use a light sensor to count black lines on the mat to get the exact distance right. My team was doing this mission and driving very slowly to make sure the sensor was able to count the lines properly. As I was watching them, I was thinking this was one of those cases where your instincts as a human don't relate well to what a robot can do. I knew the sensor could work much faster (and therefore the motor response is the limiting factor, not the sensor), but I was curious how much faster. So I did some tes

I've posted about Yoshihito Isogawa's Red, Blue, and Green books in older posts - his books are excellent resources but they've had one drawback - his books are published in Japan and can be hard to find (and expensive to obtain). And add to this the fact that most of the text in the books is written in Japanese. Until now. No Starch Press has just released three of Yoshihito's books - all of them are in full-color and the designs are divided up over Simple Machines, Fantastic Contraptions, and Wheeled Wonders. For those new to Technic building, the Simple Machines book (Red title) is indispensable. It contains hundreds of small moving devices that can provide your robots with all sorts of new and unique behaviors. The book also introduces gears in a way that is easy to understand. Because English is not Yoshihito's native language, he has chosen instead to rely heavily on icons and graphics throughout the book that give you an idea of what a mechanism does. Ta

Because of the the rush around LEGOWorld in Zwolle, I've decided to move the deadline one week forward. So, the deadline is November 7 . If you haven't made a submission yet, be sure to do it quickly. There are 8 prizes to give away, so there's a very great chance that you win! The objective: Find YouTube videos that are related to The LEGO MINDSTORMS NXT 2.0 Discovery Book. Go here to read more about the contest, its prizes and the rules. Good luck!

Here is a little eye candy just for fun. I was taking pictures of my most recent project (post coming soon), which uses the LEGO color sensor in light sensor mode, and I was surprised to find the following image of its red LED in one of my pictures: This is not Photoshopped, the star-like rays appeared on their own, I guess due to an interaction between the shape of the camera aperture and reflection/refraction/diffraction between the different lens elements. This is with the red LED shining brightly, as it is in light sensor mode with red illumination (or red lamp mode). The photo was taken at f/16 for 0.8 seconds with fairly bright but diffuse ambient lighting, and a fixed (prime) 50mm lens. So then I had to try the other colors. Notice how the different wavelengths of light cause different diffraction effects. Or is this just differences in the LEDs themselves? Getting a similar image in color sensor mode, when all three LEDs are shining, was harder, because the LEDs are much d

Today 20 October LEGOWORLD opened its gates for the 10th time. with some of the most inspiring models ever seen. here are some (poor Iphone) Pictures: Martijn Bosgraaf's factory that can build a car but also a house! A working Roller coaster, with 360 loop. The preparation of the MINDSTORMS area. Looking forward to see you all there! Martyn

Someone (willgorman on YouTube) has built a nice functional LEGO version of a rapid prototype machine. MakerLegoBot uses standard LEGO bricks to build small models one brick at a time. Inspired by RepRap & MakerBot, this is a fairly impressive implementation using 3 NXT's (yet still looking slim and svelte!). I don't even want to embed the YouTube video here, because a creation like this really needs a nice written description - which they provide over at BattleBricks . Take a look... and if you are going to Zwolle, this should be there as well! I wonder how far you could take this. A long time ago (OK, 2005), Ian Hendry of rtlToronto built an automated duck assembly robot that was really amazing. It only built one thing (LEGO ducks... but nice cute ones), but did it from raw pieces, not pre-built sub assemblies, and did it with a single RCX. More recently there was the automated car assembly robot , but it was huge and worked with pre-built assemblies. And there have bee

Only two days to go for the largest LEGO® event of the world: the LEGOWORLD 2010 opens its doors on Wednesday in Zwolle, Netherlands, the day after tomorrow! It will last no less than a complete week on an enourmous area in the IJsselhallen  and feature hundreds of exhibitors, shops, events, challenges and shows for ten thousands of visitors. You will meet there also a lot of MINDSTORMS people in person that regularly appear in our blog entries as well as a lot of authors of this very blog (this time, we also will have participants of the MINDSTORMS Community Partner Program from 12 countries!). I myself will serve both as exhibitor and spot reporter for THE NXT STEP. If you can manage it, visit the LEGOWORLD - it's well worth it!

Image courtesy of dexter industries Dexter Industries , a 3rd party provider of hardware for the NXT, has released a solar power system for the NXT: "dSolar Systems from Dexter Industries allow you to power your Lego Mindstorms NXT robot using nothing but the sun! This 9V solar power system is compatible with Lego Mindstorms NXT creations and includes everything you need to get started. Easily attach the solar panel to any of your Mindstorms NXT creations." Interesting stuff! Browse to their website and have a look. There are also some interesting projects and videos on their blog .

Several contestants have already made their submission, but if you too want to qualify for a free copy of the LEGO MINDSTORMS NXT 2.0 Discovery Book , or LEGO prizes, be sure to make your submission in time! The current deadline is October 31 . The objective: Find YouTube videos that are related to The LEGO MINDSTORMS NXT 2.0 Discovery Book. Go here to read more about the contest, its prizes and the rules. Hint : As you can see using the link above, there are 8 prizes that you can win. So, if you want to win a prize, you should really submit more than 8 links ;). It's not difficult (there are more than 8 videos of the Snatcher alone). Just search smart!

Many NXT fans are already familiar with the work of Yoshihito Isogawa... and many of us own the Japanese versions of his books . Well, No Starch Press has now released three of his books, translated and in full color. Details below: The Books http://nostarch.com/technic_machines http://nostarch.com/technic_wheels http://nostarch.com/technic_contraptions Videos http://www.youtube.com/user/ISOGAWAYoshihito#p/u/2/UEk5v0jNp_4 http://www.youtube.com/user/ISOGAWAYoshihito#p/u/1/k8kohDn6oLI http://www.youtube.com/user/ISOGAWAYoshihito#p/u/0/ZSFrkgGkvIM If you are not familiar with Yoshihito's work, now's your chance to see some of the most interesting and unique mechanisms built from LEGO parts... and many of these mechanisms are simply stepping stones to giving your own robots more advanced movements and abilities. I love my Japanese versions, and am now happy to have the English translation versions in my book collection.

If you're not familiar with Make magazine, now may be the time to pick up a copy (or subscribe - much cheaper per issue). Issue 24 features an NXT controlled satellite as seen here in this cover image. I don't have any more details as my issue hasn't arrived yet, but it looks pretty cool! Each issue usually has a theme, and this one is Space Projects - 10 of them, apparently. We all know that the NXT has been launched using high-altitude balloons, but this is the first I've heard of one actually being launched with the intent of orbiting the planet...

Image courtesy of TLG The LEGO Group™ has just announced the first official Android  cell phone application for LEGO® MINDSTORMS: "We are happy to announce the launch of the MINDdroid application for Android (2.1 or higher) phones, that will allow you to get instant access and control to your NXT robot, and give the ability to control by the flick of a wrist! The MINDdroid app is a remote-control application that allows you to create a wireless connection directly with your NXT, and once a connection is established, you can tilt and turn your phone to make the robot move forward, turn to the sides, and by pressing an action button on the phone's screen, activate the Action motor. If you have a Shooterbot or other robot using two motors for motion and have a spare motor for actions, you are in for a lot of fun!" Cool stuff! To read more, go to the MINDSTORMS News page .

The challenge was to remake Wall-E3 (the one that went to Atlanta for the FIRST World Championship earlier this year) but to use only Mindstorms this time! No Power function or 3rd party components!!  humm,   Well we all know the NXT Servo motors are 'huge' and only 3 can be plugged  per NXT... Conclusion?  zWall-E4! Tech. Spec.: 3 NXT bricks 8 NXT Servo Motors 2 Color Sensors (for the eyes) 1 Ultrasonic Sensor 4 Touch Sensors & Bluetooth was used to link all 3 NXT's via a NXT-G 2.0 program. OK so he doesn't transform (yet), but I'm still quite happy with the result. There is always room for improvement though :) I look forward to hear your comments. Hope you enjoy this short video and for those lucky to be there, make sure you come see us at the MCP booth at LEGO WORLD 2010 next week. I: /. 7.

An NXT version of an automated carparking station. Nice use of the RFID sensor to identify different cars and I really like the 'lift' mechanism. *EDIT* This video is from Stan Khaykin, from the 'Great Minds Learning Center - www.buildcoolrobots.com' -- Damien Kee www.damienkee.com

Here are some cool videos to follow up on Jim's post about these great new wheels from Rotacaster. By sparramc: A Lego Mindstorms NXT Autonomous Quad Rotacaster Killough Platform Omni-Bot By xandersoldaat: Rotacaster Test 2 (visit his blog for other test videos) By bazmarc: LEGO Space Police Sentinel - Rotacaster - Mindstorms The official page to find more info on these Next Generation Holonomic Robot Wheels by Rotacaster can be found here:  http://www.rotacaster.com.au/robot-wheels.html

A nice resource for FLL coaches is available over at http://www.legoleaguecoaching.org/ - be sure to take a look at some of the great articles related to coaching a robotics team.

I received a detailed email from RJ McNamara about a new wheel available for NXT robotics: The Rotacaster is the only Omni-wheel I'm aware of that will track in a "Killough Platform" like theory suggests, resulting with virtually nil slippage on all household hard floors surface. The "Durometer Type Rollers" in the Omni-wheel exceeded all my expectations by a long way after trying those offered from other manufactures! The "Durometer Type Rollers" work like a sticky compound race tyre on a high performance race vehicle. Many thanks must go to Mr. Peter McKinnon from Rotacaster for having faith in me to take on the challenges involved with developing what is an Industrial Rotacaster Omni-wheel, into a product suitable for use with Lego Mindstorms & Technics Robots. The Actual cost of the Lego-Rotacaster Omn-wheels and date of availability is yet to be released. The standard non-Lego R-2048-01 Double 48mm individual Wheel Price is AUD $13.75(inc

Just came across this nifty little robot My wife says "why??" ... I say "Why not!" :) from tinkerology -- Damien Kee www.damienkee.com

Remember Yoshihito Isogawa's brilliant " Tora no Maki " book? It was available as an PDF and written in Japanese; this was no real obstacle, though, as most of its content consists of images. Yoshihito Isogawa announced now that in October, it is going to be published by No Starch Press as a three printed english books in the United States: LEGO TECHNIC Idea Book - Simple Machines LEGO TECHNIC Idea Book - Wheeled Wonders LEGO TECHNIC Idea Book - Fantastic Contraptions Great to hear - I encourage anyone who is not in possession of this great collection of ideas and strategies for building with LEGO® TECHNIC so far to go for it.

Can you figure this one out? I'm only sorry I won't be in Zwolle to meet NeXTSTORM in person. (That is where LEGO World is being held in the Netherlands at the end of this month.)

Be sure to check out this new NXT project that uses LeJOS - it's called the SkyPointer Project and it points to objects such as planets, moons, and more.

Comets consist of the most primitive, i.e. unprocessed, material in the solar system. To understand the earliest epoch of solar system formation, we must investigate the nature of this material. Much of what we know of comets presently comes from remote sensing using Earth-based telescopes, plus a few brief flybys that have added only a few hours of in-situ observation. The Rosetta mission is poised to make a dramatic advance in our understanding of comets by matching trajectories with comet 67P/Churyumov-Gerasimenko, orbiting it, and setting a lander on its surface. [1] ESA's Rosetta mission will rendezvous with comet Churyumov-Gerasimenko in 2014. In November of that year, Rosetta's Philae lander will touchdown on the comet and thoroughly investigate its composition. ESA Space Scientist Detlef Koschny build a LEGO model of Rosetta mission  in order to visualize the complicated orbital choreography used in this space mission. He then goes on and demonstra

Blogs, forums, and file sharing have changed the face of how we interact... but I'm guessing I don't really need to tell that to anyone reading a blog, right? About a month ago I was contacted by a NXTasy (may it rest in peace) user, David Bell, about developing a robot that could produce a bar graph style display of CO2 measurements for a public 4-H display. He even offered to ship me all the LEGO parts, sensors, everything needed, & pay for the materials I might need to acquire. Even to compensate me for my time. I didn't take him up on it. The reason wasn’t that I was in a mean mood, or that I’m independently wealthy (feel free to throw those tens and twenties this way folks!). It co mes down to I do this for fun, and if I can help others out in the process, so much the better… and if we can all do it dirt cheap, fantastic! So instead of them shipping everything to me, and me producing a “product”, we decided to collaborate long-distance. The goal was to produce