Tag Archives: robot

FIRST LEGO League Compatible Robot – Mark III

FLL-Robot Mark III - logo
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This is third in a serious of FIRST LEGO League (FLL) Robot which can be made from a single LEGO Mindstorms EV3 (Home 31313) kit and a handful of other LEGO Technic Parts. It was built with the intention of being demonstration Robot that the team members of the Metal Minds Robotics Team I mentor could build at home with their own EV3 Kits.

This Robot is a development of the Mark II Robot with a number of refinements, and the addition of another Power Take Off point at the rear of the Robot. This later addition allows for two Powered Attachments to mounted on the Robot at one time. Another improvement which greatly improves the Robots Turn and Straight Line accuracy is the replacement of the Jockey Wheels with a pair of  “Angled Ball Joints“.

LEGO Mindstorms EV3 Ball Chasing Robot using the PixyCAM

PixyCAM Follow the Ball
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This article aims to describe how to programme a LEGO Mindstorms EV3 robot that chases things, like a ball in this example. It’s the same robot and program that’s used in the PixyCAM Video below. This robot and program is a good launching point for other projects, and it’s a good introduction to PID control, which is used throughout robotics and engineering in general.

FLL Robot from a single EV3 31313 Kit: Mark II

FLL Robot from a EV3 Kit
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This is my second attempt at a FIRST LEGO League (FLL) Robot which can be made from a single LEGO Mindstorms EV3 (Home 31313) kit. It was built with the intention of being demonstration Robot that the team members of the Metal Minds Robotics Team I mentor could build at home with their own EV3 Kits.

FIRST LEGO League (FLL) Robot from a single EV3 Kit

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This is my first attempt at a FIRST LEGO League (FLL) Robot which can be made from a single LEGO Mindstorms EV3 (Home) kit. It was built with the intention of being demonstration Robot that the team members of the Metal Minds Robotics Team I mentor could build at home with their own EV3 Kits.

LEGO Mindstorms EV3 Ball Catching Robot.

EV3 Ball Catching Robot
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This robot is a very clever design using the Mindsensors NXTCam-v4. Actually two of them for stereo vision. The instantaneous response of the Delta Robot design for catching the ball is outstanding choice by the owner Dillon Sharlet!

Wii-NunChuck Controlled Mindstorms NXT Soccer Robot

Wii Soccer Bot
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For the forth coming [brixhibition] Exhibition at the end of April, I have been asked to set-up and run a couple of interactive Robot Soccer fields.The Robots needed to be robust and reliable as members of the public will be interacting with them. Also they need to have a a simple, intuitive, and easy to use hand held controller. I have used Sony Playstation PS-2 Controllers, but they have far too many controls that would be unused and confusing to the first time operator. I chose to use a Nintendo Wii® Nun-Chuck Controller for the job.

LEGO Mindstorms NXT Stair Climbing Robot

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After seeing this LEGO Mindstorms EV3, Stair Climbing Robot on ‘The NEXT Step Blog‘, I decided to build my own NXT Version. I had attempted a couple before several years ago, but they weren’t overly successful. Now with lots of IMU Sensor add-ons for the Mindstorms NXT, it makes the task a lot easier.

LEGO Mindstorms NXT Bin Emptying Robot – Mark III

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This is a LEGO Mindstorms NXT “Bin Emptying Robot Mark III”. It is part of a larger project I have been working on, my “Ball Sorting Factory“. A forklift delivers full Bins of balls to be emptied. The Emptied bins are then taken away to the processing facility to be refilled. The Mark II version worked well, but was a little unreliable, unlike this version. Like the previous version, it uses a “Ball Repository” to store, mix and reload the Production Line with Balls when the “Ball Sorting Factory” needs them.

LEGO Mindstorms NXT Bin Emptying Robot – Mark II

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This is a LEGO Mindstorms NXT “Bin Emptying Robot Mark II”. It is part of a larger project I have been working on, my “Ball Sorting Factory“. A forklift delivers full Bins of balls to be emptied. The Emptied bins are then taken away to the processing facility to be refilled. The Mark I version worked well, but it was slow and very noisy, unlike this version. Also this version uses a “Ball Repository” to store, mix and reload the Production Line with Balls when the “Ball Sorting Factory” needs them.

LEGO Mindstorms NXT Bin Emptying Robot – Mark I

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This is Mark I of my LEGO Mindstorms NXT Ball Sorting Factory, which I have been working for a number of weeks. The whole project consists of three main parts. Firstly there is the ‘Ball Sorting Factory’, made up of Gantry System with 3-Axis: Front-Back, Left-Right, and Up-Down for the Ball Gripping Claw. The Second Part is the Forklift Truck which carries the ‘Ball Bins’ from loading to emptying positions. The final part is the ‘Ball Bin Emptying” mechanism & Conveyor system.

Mindstorms NXT Soccer Playing Robot

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This is the Mark I version of my LEGO Mindstorms Soccer Playing Robot.  The Robot relies on 3x Rotacaster omni-whheels in a Holonomic Platform configuration for movement. The three Rotacasters are driven by 3x NXT Motors connected to the NXT Brick.

UPDATE: LEGO Mindstorms NXT Tic-Tac-Toe Robot

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LEGO Mindstorms NXT TicTacToe (Noughts & Crosses) Playing Robot was programmed with NXC, using Daniele Benedettelli’s ‘TicTacToe AI’ Code. It uses a Hitechnic Colour Sensor to detect the coloured balls placed on the playing board. The game has 3 difficulty levels starting with ‘Novice’ that places balls at random. Next is ‘Normal’, followed by the almost impossible ‘Expert’ level.

Lego NXT: Tic-Tac-Toe Playing Robot

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LEGO Mindstorms NXT Tic-Tac-Toe (Naughts & Crosses) Playing Robot was programmed with NXC, using Daniele Benedettelli‘s ‘AI‘ Code. The Robot uses a Hitechnic Colour Sensor to detect the coloured balls placed on the Game Board. The robot’s ability to detect the correct colour of the balls, is far superior when using the Hitechnic Colour Sensor than trying to use the standard LEGO Light Sensor.

Lego NXT Tree Climbing Robot “Sloth”

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222Doc says, “This turned out to be the hardest build, design and program to date. I will never again say to my self this will be easy. 100’s of hours in this thing. it could be improved a lot perhaps one day.”

NXT based Bicycle Robot

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I was wondering too myself a few weeks ago if anyone had moved on from the NXT Segway to a “Self-Balancing-Bike” or even a Unicycle. Mechanically and Electronically I thought it would be relatively easy to build, but programming would be a lot more of a challenge.

Low and behold it’s been done by Joep Mutsaerts, with his NXTbike-GS (self-balancing bike robot by steer-into-fall)!

The proof came in the form of the following NXT-Bike Video. The LEGO Mindstorms NXT based bicycle robot uses lateral stability control using the concept of “



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