User Manual

64
Lesson 25 Microphone Sensor
Introduction
There are two kinds of microphone sensor in this kit: microphone sensor and high-sensitive
voice sensor (as shown below). The only difference between them is sensitivity. In this
experiment, we will take the microphone sensor for example. You may try to apply the other
sensor based on what you've got during the process.
Both sensors have two outputs:
AO: analog output, to output voltage signals from microphone in a real-time manner
DO: When sound intensity reaches a certain threshold, the sensor outputs high or low level
(you can adjust the threshold by potentiometer)
Microphone Sensor High-sensitive Voice Sensor
Components
- 1 * SunFounder Uno board
- 1 * Breadboard
- 1 * USB data cable
- 1 * Microphone sensor module
- Several jumper wires
Experimental Principle
Microphone can convert audio signal into electrical signal (analog quantity), then convert
analog quantity into digital value by ADC and transfer it to MCU to process.
SunFounder