Lesson 4 - Ultrasonic Sensor

The ultrasonic sensor looks like the mBot's "eyes".  These units are designed to send and receive a sound signal.  By sending our a "chirp" and recording the time for the echo to return, the sensor can tell you how far away something is.

If you turn it on, you can hear the chirping!

Be careful!  Do not poke the screen that covers the "eyes".  They can be pushed in and it would be very hard to fix.

When you plug in the ultrasonic sensor, make sure you remember which Port (1,2,3, or 4) that you plugged it into!