The German team, consisting of 5th graders, created a program for the Riley Rover robot using an ultrasonic sensor to avoid crashes. They used a loop block with the infinite symbol to continuously compare the distance measured by the sensor in centimeters to 100 cm, causing the robot to stop at 1 meter from obstacles. When they tested the program, the robot eventually crashed because the sensor does not cover the entire surface. They concluded the challenge was to get the robot as close to a wall as possible without crashing.

1. ERASMUS Mindstorms
Activity 3
NAME: German Team
GRADE: Year 5
DIFFICULTY FROM 1 TO 10: 3
Scenario. Working with the Riley Rover which has been already built adding the ultrasonic
sensor. Using block loop to keep on driving without crashing. Distances, comparing.
Which symbols do you use to compare distances? < > =
Which unit uses the robot to compare? cm
How many cm. would you type to make the robot
stop at 1 meter.
100 cm
Try out and draw the program that you have used.
Which block will you use so that the robot does not
crash ever?
Loop
Which symbol should you have in that block so it
does not crash.
Infinite
Try out the program and say if the robot finally
crashes. Why?
Finally evaluate your team work and say why.
Yes,because the sensordoesnot
coverthe whole surface
Challenge
Try to get the robotas close as possible tothe wall
withoutcrashing.

2. ERASMUS Mindstorms
Activity 3
NAME: German Team
GRADE: Year 5
DIFFICULTY FROM 1 TO 10: 3
Scenario. Working with the Riley Rover which has been already built adding the ultrasonic
sensor. Using block loop to keep on driving without crashing. Distances, comparing.
Which symbols do you use to compare distances?
Which unit uses the robot to compare?
How many cm. would you type to make the robot
stop at 1 meter.
Try out and draw the program that you have used.
Which block will you use so that the robot does not
crash ever?
Which symbol should you have in that block so it
does not crash.
Try out the program and say if the robot finally
crashes. Why?
Finally evaluate your team work and say why.
Challenge
Try to get the robotas close as possible tothe wall
withoutcrashing.