This is the first task in which your students will make many mistakes. We will prepare you for them now.

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- #623
- 20 Aug 2017
Omitting the unlimited movement block
The first block is usually for rotations and the robot will make one rotation and then stop and wait for a press. The green lights of the brick will flash showing there is a working program but the robot will remain motionless.
Let’s remember what unlimited movement is
- How many rotations the robot should make in order to reach the wall?
- We don’t know!
- When we don’t know, we should use the unlimited movement block.
When we use a sensor, we should always use unlimited movement as well.
Omitting the stop block
The robot moves for an unlimited period of time, touches the wall, pushes a little bit against it and then stops. If the robot pushes against an object, for example a box, the effect will be even more visible. You can allow students put their hands in front of the robot and feel it continues to apply some pressure even after the touch.
The reason is that they have forgotten to put a stop block and the robot continues moving for about half a rotation forward before it understands the program has ended and there are no other commands.
Courses and lessons with this Tutorial
This Tutorial is used in the following courses and lessons

Robotics with LEGO - Level 1.0 - Adventure in Space
The first level of the Robotics with LEGO curriculum for students in fifth to twelfth grades.
Various constructions with robots are built. Learn how to control the motors so that the robot navigates around the Moon and Earth in various ways. Getting to know the first two sensors. The robot can feel its surroundings with the help of the Touch sensor and avoid obstacles.
The Ultrasonic distance sensor can help the robot avoid obstacles. Students work with concepts like loop, degrees and medium motor. Robots can now do two different actions at the same time - while solving missions on a field, the third motor clears detected obstacles.
- 126
- 123:52
- 150

Level A1. Introduction. Robotics with LEGO
Introduction to robotics - The first level of the Robotics with LEGO curriculum for students in second, third or fourth grades. A journey in space, with robots. Various constructions with robots are built. Learn how to control the motors so that the robot navigates around the Sun, the Moon and Earth in various ways. Getting to know the first of the sensors. The robot can feel its surroundings with the help of the Touch sensor and avoid obstacles.
- 142
- 133:42
- 187
Lesson 6 - Touch sensor
In the next lesson we usually do a graduation. Write down your impressions about the students and the reasons why they have the grades you gave them.
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- 3
- 6
- 3d_rotation 0