MINDSTORMS EV3 Core Set

Stop at Line

Use the Colour Sensor to stop the Driving Base when a line is detected.

0-30 min.
Beginner
Key Stage 3
curved-move-connect

Build It

Build the Driving Base model.

ev3-robot-driving-base

Test It

Recreate the program shown below, then download and run to test. Set the sensor threshold for best results.

Hints
For best results, ensure the dark line is at least 20% darker than the surrounding surface. The line may not be detected if the Driving Base turns too quickly.

curved-move

Program Summary

Start
Large Motor - On
Wait - Colour Sensor – Compare Reflected Light Intensity[Less Than, 50]
Large Motor - Off

Modify It

Now it’s your turn! See if you can make the Colour Sensor detect a lighter-coloured line.

Hints
If the difference between the x and y values is too small, the line will not be detected. If this occurs, try recalibrating the sensor.

curved-move2

What is next?

ModifyIt_0

Teacher Support

Students will:
Use the Colour Sensor to stop the Driving Base when a line is detected.

LEGO® MINDSTORMS Education EV3 Core Set
EV3 Software or Programming App