Microphone Sound Sensor(KY-038): 두 판 사이의 차이

2025년 3월 27일 (목) 18:36 기준 최신판

This module detects the intensity of sound and changes the output voltage according to the ambient sound level, outputting it as an analog signal.

It is similar to the KY-037 model.

Specifications

Operating Voltage [V]: 3.3 ~ 5
Frequency Range [Hz]: 50 ~ 20K

Example Usage Hardware

Arduino board
Jumper cables
KY-038 Sound Detection Sensor

Connection

Although the digital pin is not used in this example, please refer to it as a connection example.

When using the KY-038 module digitally, supply power to the module in a quiet environment and then adjust the sensitivity by turning the variable resistor.

Arduino Uno	KY-038
5V	+
GND	G
D8	DO
A0	AO

Example Code

This example turns on the internal LED (pin 13) of the Arduino when sound is detected and then turns it off after a certain period.

int analogPin = A0;
int ledPin = 13;
int analogVal = 0;
long int past_time = 0;
int past_analogVal = 0;

void setup() {
  pinMode(analogPin, INPUT);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
  Serial.begin(9600);
}

void loop() {
  analogVal = analogRead(analogPin);
  if (millis() - past_time > 1000) {
    if (abs(past_analogVal - analogVal) > 3) {
      digitalWrite(ledPin, !digitalRead(ledPin));
      past_analogVal = analogVal;
      past_time = millis();
    }
  }
  delay(10);
}

@@ 1번째 줄: / 1번째 줄: @@
-{{#seo:|title=아두위키 : 아두이노 소리 감지 센서(KY-038) 가이드|title_mode=append|keywords=아두이노, 정보과학, 메이커학습, 수행평가, 소리 감지 센서(KY-038), 아두이노 작품, 캡스톤작품, 아두이노 예제코드|description=아두이노로 소리 감지 센서(KY-038)를 제어하는 방법(기본정보, 회로, 예제 코드)을 소개합니다. 정보과학과 메이커수업에 활용가능합니다.}}
+{{#seo:|title=ArduWiki: Arduino Sound Detection Sensor (KY-038) Guide|title_mode=append|keywords=Arduino, Computer Science, Maker Education, Performance Assessment, Sound Detection Sensor (KY-038), Arduino Project, Capstone Project, Arduino Example Code|description=How to use the KY-038 sound detection sensor with Arduino (basic info, wiring, sample code). Ideal for CS and maker classes.}}[[파일:소리감지ky038대표이미지.jpg|center|class=coders100]]
-[[File:소리감지ky038대표이미지.jpg|center|class=coders100]]
 This module detects the intensity of sound and changes the output voltage according to the ambient sound level, outputting it as an analog signal.
@@ 68번째 줄: / 68번째 줄: @@
 </syntaxhighlight>
 === Execution Result ===
-Please check the working video at the [https://blog.naver.com/gongzipsa/223187239751 link].
+<div class="coders70">
+<youtube> Ja-vqIg21eQ </youtube>
+</div>