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Large Microphone Module(ST1146)
1. Introduction
It’s a high sensitivity sound detection module, which has two output signal pin.
one digital pin(D0), When it detect some sound up to certain threshold, it can output
High or Low level. One analog pin(A0), it can real-time output voltage signal of the
microphone.
Specification
Voltage:5V/3.3V
Electret microphone(It’s different from module4)
there is a mounting screw hole 3mm
the use 5v DC power supply
with analog output
there are threshold level output flip
high sensitive microphone and high sensitivity.
a power indicator light
the comparator output is light
Weight: 4g
Frequency Response range:50Hz～20kHz
Impedance：2.2K ohm
Sensitivity：48~66dB
polar pattern：Universal
Operating temperature: -40 to 85 degrees celsius
Operating humidity: 30~90%
Storage temperature : -5 to 30 degrees celsius
Storage humidity : 20~75%
product size: 44*15*10mm
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2. Pinout
Pin
Description
A0
Analog signal output pin
G
Ground
+
Power(5V/3.3V)
D0
Digital signal output pin
3. Example
We will use three example to show the different function of this module.
Example 1 show you how to use the digital pin(D0), Example 2 show you how to use
the digital pin(A0), In Example 3, we can try to combine this two function into one
experiment.
3.1 Example 1
This example show you the digital pin function, connect Pin12(Arduino) to a LED
light, and connect this module as below, and upload the code.
Then turn the variable resistor until the LED12 turns off. Now you can handclap or
make a sound, you will see the LED12 turns on.
Code for Example1
********Code begin********
int Led = 12 ;// define LED Interface
int buttonpin = 7; // define D0 Sensor Interface
int val = 0;// define numeric variables val
void setup ()
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{
pinMode (Led, OUTPUT) ;// define LED as output interface
pinMode (buttonpin, INPUT) ;// output interface D0 is defined sensor
}
void loop ()
{
val = digitalRead(buttonpin);//
if (val == HIGH) //
{
digitalWrite (Led, HIGH);
}
else
{
digitalWrite (Led, LOW);
}
}
********Code End********
3.2 Example 2
This example show you the Analog pin function, connect this module as below
picture, and upload the code.
Then open the Serial monitor, you can see some number between 0 to 1023. And
now if you make some high or low voice, the number is changing.
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Code for Example2
********Code begin********
int sensorPin = A5; // select the input pin for the potentiometer
void setup ()
{
Serial.begin (9600);
}
void loop ()
{
sensorValue = analogRead (sensorPin);
delay (500);
Serial.println (sensorValue, DEC);
}
********Code End********
3.3 Example 3
In this example we try to combine digital pin and analog pin together to control two
LED lights, connection and code as below.
Code for example 3
********Code begin********
int Led=13;
int ledPin=12;
int buttonpin=7;
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int sensorPin = A0;
int sensorValue = 0;
int val;
void setup()
{
Serial.begin(9600);
pinMode(Led,OUTPUT);
pinMode(ledPin, OUTPUT);
pinMode(buttonpin,INPUT);
}
void loop()
{
sensorValue = analogRead(sensorPin);
digitalWrite(ledPin, HIGH);
delay(sensorValue);
digitalWrite(ledPin, LOW);
delay(sensorValue);
Serial.println(sensorValue, DEC);
val=digitalRead(buttonpin);
if(val==HIGH)
{
digitalWrite(Led,HIGH);
}
else
{
digitalWrite(Led,LOW);
}
}
********Code End********
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