Question 9:

Robot eyes:  Back to the book again. Add the ultrasonic sensor.  The ultrasonic sensor measures distance in centimeters.  Write a program that makes the car back up if something gets closer than 25 cm. Back up to a distance of 50 cm then stop.

 

 

Problem 9 uses the new ultrasonic sensor to run away from a predator. This sensor measures distance in centimeters. Start this program with a wait for distance less than 25 cm. Start the motors backwards and wait for distance greater than 50 cm, then stop the motors. Again loop if you like.

 

 
Question 10

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