Use a motor as a generator and save up electricity in the capacitor until the light comes on - about 30 seconds.
The car travels clear across the room and back
for over 3 minutes.
The amount of electricity can raise the heavy weight.
These two made the Intelligent house.
They used RoboLab to program the garage door open when the car goes between the light and light sensor.
The Green City groups programmed using the light sensor.
The reading for dark and light are about 40 and 60.
First they programmed the robot to go to dark.
Then they programmed the robots to follow a line.
The program uses loop and light fork to make one side go then the next and repeat.
They are using those parts to do the recycle missions.