Instructions

10
Be like a Bat
Using an ultrasonic sound sensor
we can send out a signal and
time how long it takes to come
back. Using this information we
can measure how far away an
object is. Here we’ll learn how to
measure that distance.
Can you make an LED light turn on if the
distance is too close?
Challenges Real-life Applications
Drone
to keep height
Parking
Sensor
Inventor’s Journey
4
Robot