Lesson 20 Sound Sensor Module
Overview
In this lesson, you will learn how to use a sound sensor module. This module has
two outputs:
AO: analog output, real-time output voltage signal of microphone
DO: when the intensity of the sound reaches a certain threshold, the output is a high
or low level signal. The threshold sensitivity can be achieved by adjusting the
potentiometer.
To make sure the microphone can detect your voice normally, please try to change
its sensitivity by turning the blue precise potentiometer on the module. Given to its
preciseness, it takes at least 10 circles for you to get some response.
Component Required:
(1) x Elegoo Mega2560 R3
(1) x Sound sensor module
(4) x F-M wires (Female to Male DuPont wires)
Component Introduction
Microphone
Transducers are devices which convert energy from one form to other. A
microphone is a transducer which converts sound energy to electrical signals. It
works opposite to a speaker. Microphones are available in different shapes and sizes.
Depending on the application, a microphone may use different technologies to
convert sound to electrical signals. Here, we are going to discuss about the electret
condenser microphone which is widely used in mobile phones, laptops, etc.
As the name suggests, the electret condenser microphone is a parallel plate
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