# Mindstorms

## Back to LEGO Building & Reviewing

I have had a really different summer and unfortunately I haven’t had the time I was hoping to have for building LEGO ( or anything else in fact )… but it is time to move forward so expect on the following weeks a few of these beauties reviews, the Montecarlo tutorial for the EV3 differential […]

## What happens when a Robot has different size wheels?

This article is another spin-off of the Differential-drive robot calibration. If you remember the article at the end you found that wheels are most of the times of different sizes with differences of around 0.01% but that are big enough to affect movement over 1 meter. So… What happens when you move one meter straight

## HOWTO Calibrate a differential robot: UMBMark Explained

This article is just a follow-up of drawing squares with leJOS where the problem of calibrating correctly your differential robot appeared. So, if you recall our squares drawing robot, we needed to travel around the four legs of a square turning 90 degrees on each corner so that we ended in the initial position using

## Draw a Square: Using Motors in leJOS EV3

Well, if you successfully installed leJOS using the tutorial then your first steps would be to write a program to do something with it and then you will see the abyss that exists between you and a nice leJOS program. So let’s learn leJOS basics to write our own programs. Most of the documentation available

## The LEGO Mindstorms EV3 Laboratory Review

The LEGO Mindstorms EV3 Laboratory is one of the best books about Mindstorms that I have found and not because of their robots but because of their great recipes and lovely ideas. Well played. I have recently been reading a new book about LEGO Mindstorms EV3 written by Daniele Benedettelli and my eyes have been

## HOWTO Install leJOS 0.8.1 on LEGO Mindstorms EV3

LeJOS is a programming environment to program your LEGO Mindstorms robot using Java. Yes, Java. Yes, that means real variables, arrays, bluetooth, TCP/IP, files, etc… Stop drooling and read with me how to install it on the EV3 brick. You can watch the videotutorial about how to install LeJOS in the EV3 brick Install Java

## HOWTO Remove MicroSD off EV3 Brick

I really don’t know the reasons behind not adding that f#\$% spring on the MicroSD slot so that the card can be pushed out. So as LEGO decided not to add the spring, here is my tutorial to help you take your SD card out of the EV3 brick. Hope it has been useful. Please

## HOWTO Build your own 3-Wheels Holonomic Robot using LEGO

A in-depth tutorial about how to create your own three wheels Holonomic Robot using LEGO Mindstorms EV3 and a bit of Maths knowledge. An holonomic robot is a robot that can move on any direction and even rotate over itself while moving. Do you want to create a holonomic robot? Well, let’s me explain what

## LeJOS working on my EV3

Finally I got LeJOS working on my EV3 with WiFi. As you can imagine I am writing just another tutorial about how to install it on the brick and how to configure Eclipse to work with the brick. Pretty excited! In case you don’t know LeJOS is a programming environment for the EV3 using Java

## Stand up! Save the Robot!

The coolest idea I have had! Don’t let the robot down! Soon with instructions and program. I am really excited with this one because it is small, fun and extremely playable! LiRob is built with a single EV3 and the thread from 42006 Excavator. So I think it is quite easy to build another one