LEGO MINDSTORMS EV3

Use any corner of the room as a starting position of the robots. The two perpendicular walls will be the feeding spots. Parallel to one of the walls, about two meters ahead, stick some tape which will mark the entrance to the coral reef. Turn a box for LEGO parts upside down and use it as a rock. You can see the field below:

How to make the robot stay idle while the program is still running.

Have you noticed when some programs are either loading or executing, they display text on the screen that tells you what is happening? Many programmers add a message line before every operation, where they say what their program is doing.

This way, they can easily find a problem if such appears. This is called debugging and we will learn how to apply it by printing messages on the brick display.

We can calculate how much time the motor should turn at a given velocity in order for it to reach the required position, but this will not be necessary. In such cases, it would be much easier to use the run_angle().

You are not using sensors?! You are positioning the mindstorms robot only by moving forward, backwards and rotating it. That`s one of the BIGGEST mistakes teams make on the FIRST LEGO League competitions. In this video we are showing a robot with chains and how imprecise are the results are when you are not using sensors.