Video tutorials

A clutch is a mechanical device that is used for engaging or disengaging power transmission. Now we will see how we can make such a device using LEGO.

If everything is connected correctly, the Arduino microcontroller will light up, powered with 5V from the 9V battery!

The after season review continues. No. We are not publishing a single solution for the next season before it is over, but let's learn from the previous season. The current tutorial is about three missions at once on a single run with the robot. Most FIRST LEGO League teams try to accomplish one-two missions on a single run out of the base, and three is really what makes the difference

DIfferent wheels and tires will result in different behaviour of the robot. That is actually pretty common sense. The real question is what is the influence. Would the robot make smaller deviations if it has smaller wheels or it will make larger deviations? The tires could also be quite dirty or brand new. Or the wheels could be attached in different ways. 

Should the robot be with a Front Wheel Drive or a Rear Wheel Drive to make it more precise? The answer is - front wheel will probably give you better results, but the wheel drive is not the most important thing. In this video tutorial on the LEGO Mindstorms Robots, we will do a few experiments to discuss the influence of the wheel drive on the precision of the movement.  

If the battery holder already has such a cable attached to it, feel free to use it.

The LEGO Mindstorms EV3 set comes with two LARGE motors. But even though these motors look almost the same they are not quite the same. There are always some differences in their behaviour. If you have more than two motors, because you bought them or you won them somewhere at a competition, it is worth doing an experiment to find which pair of motors works best. 

You could use the LEGO Steel Balls as a third wheel on the robot. It is a caster wheel. But this is steel and as we know from basic existence on this planet, where there is steel there is also rust. The steel ball could get quite rusty and this could have an influence on the behaviour of the robot

The position of the voltage regulator won’t affect the balance much, so it’s best to place it near the DIP switch.

The balance of the construction of the robot has a great influence on how it will move. This is especially true if you would like to move in a straight line. If the robot is slightly heavier on the right it will move to the right. Here we have two robots - a Five Minute robot and a Box Robot and we will discuss the differences in the constructions and why the box robot is much better than the Five Minute even though it is using the same parts. 

If the battery holder already has a cable attached, you can use that one.

The robot can move with different speed by applying different power to the motors. It will most of the time make smaller deviations when it moves slower. But you can't just move with a power of 10 all the time. This is a way too slow especially for competitions like FIRST LEGO League or World Robot Olympiad. In this video tutorial I would like to discuss the balance between motor power and robot movement error, how does the battery influence the power of the robot and to conduct an EV3-G experiment that will record the values of the Gyro Sensor along with the current power. 

The position of the DIP switch doesn’t affect the balance much, so you can place it wherever you prefer.

This video tutorial contains a detailed description on how we accomplish the FIRST LEGO League 2018-2019 Into Orbit mission called Emergency Walk, which I think is one of the most interesting missions ever in FIRST LEGO League competitions. Join me in for a short explanation. 

In the third run Nightbeast team solves Mission 04 - Crater Crossing and partly Mission 03 -  3D printing and Mission 014 Meteoroid Deflection:

1. Eject the 2x4 Brick by placing a Regolith Core Sample into the 3D Printer.
2. Crater Crossing
3. Tries to score a meteoroid( tries to shoot a ball)

This is the first run of Team "Nightbeast", with which they solve M01 and M02 from FIRST LEGO League 2019 Into Orbit:

1. Starts with the Vehicle Payload
2. Places the Supply and Crew Payloads and rolls them to east.
3. Pushes the Solar Panel Array to the opposite side

This is the fifth and the last run of the Nightbeast team. Robot goes out of the base, do missions:

1. M11 - Escape Velocity
2. M13 - Observatory 

and stays on the field. It's a common practice for the competitors to left the robot on the field after the last run. This allows them to do some important points at the end of the match. 

In the second run Nightbeast team solves different tasks from two missions - M05 Extraction and M06 Space Station Modules:

1. Insert the Tube Module into the Habitation Hub port, west side 
2. Move all four Core Samples so they are no longer touching the axle that held them in the Core Site Model
3. Place the Gas Core Sample completely in Base