Page 115 - Robo_Genius_V1.0_flipbook_C5

they shine a flashlight or move the robot in varying lighting conditions, they will
notice that the robot behaves differently depending on the light intensity. This

shows them how sensors work in robotics to detect environmental conditions
and drive mechanical responses.

Application

Automatic Night Lamps: Light sensors can be

used in night lamps to turn on automatically when
it gets dark. This way, the lamp lights up when you

need it without having to flip a switch.

Combining Sound Sensors and Motor

Let's learn how to combine sound sensors and motors to build a simple robot
that reacts to sound, using the micro:bit’s microphone sensor.

Building a Simple Robot that Reacts to Sound

In this activity we will use microphone sensor of micro:bit. That measures a
level of sound. Microphone respond to claps and beats with an animated light
show on display of micro:bit.

The micro:bit with sound has a built-in

microphone sensor. It can react to loud and
quiet sounds, and also measure how loud your
environment is.

It can be used to respond to sound. The

microphone input sensor is located on the front
of the board alongside a microphone activity
LED, which is lit when the microphone is in use.

• When the microphone detects a loud sound, like a clap, it shows a large
heart on the LED display.
• If it detects a quiet sound, for example after your clap has finished, it shows

a small heart.

• The effect of this is to create a simple heart animation that responds to
claps or strong beats in music.

Basic Motor Control and Sensors 113