On of the most precise ways to position on the FIRST LEGO League and other competition fields is to follow and align and in this tutorial we demonstrate exactly this - how consistent and reliable this method is to reach specific mission models. In this way you know that every time you will be at the right place, which is great.
In this 10 out of 10 tutorials we do 10 runs that demonstrated how consistent and reliable it is to stop at the second intersection. This is useful as it is one of the main ways to figure out how to position yourself on the field.
All worked as expected, up until know because the robot got lost. This happens when we turn right and the line does not continue to the right. Now the robot must somehow understand that it is "lost" and escape.
We would look at the rules of the competition over our small model and we would start solving the field.
Continuing with the Proportional algorithm for following lines. Smooth and stable this is the first part of the PID.
How do you detect a cross-section and move from following the main line to following the crossing line. In this series of video tutorials we are starting with a very simple solution that could work in most of the cases. It is especially useful for the FIRST LEGO League Trash Trek competition where there is such a section.
One of the smartest things you could do in any software program is to extract logic in small reusable, simple, understandable units. In EV3-G these are called Blocks and we are going to extract the logic for finding a minimum and maximum for each of the sensors in a new block.
Let's review the LEGO Mindstorms EV3 Intelligent Brick
The EV3 brick is the main computer of your LEGO robot and it has a display, a few buttons and various ports.
A phone holder that rings an alarm when the phone is picked up. It is a plate, lying on a rubber wheel, that changes its height, based on the weight of the object placed on top. The color sensor detects these changes and rings the alarm. With some fine tuning, this robot can even act as a weighing machine.
This modification of the box robot contains large wheels. It was specially requested by you and we have it.
In the LEGO Mindstorms Robot Inventor set there is only one color sensor. The original Gazon is build from LEGO Education SPIKE Prime where there are two light sensors. The idea behind this robot is to be able to build it from Robot Inventor and to use it during FIRST LEGO League competitions
Following the previous tutorials from the course, implement the calibration of the minimum and maximum values.
With this 10 runs we demonstrate the consistency and reliability that could be achieved with a LEGO Education SPIKE Prime robot and a 2-states simple line following algorithm. It is not bad. Still there are some things you should consider when using this program and one of the things is the use of the timers
