Arduino

const int ledPin = 13; //built-in led
const int soundPin = A0; //sound sensor

void setup()
{
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop()
{
  int value = analogRead(soundPin); //read the value of value sensor
  Serial.println(value); 
  if (value > 58) //if the value of sound sensor is greater than 600
  {
    printf('turn on');
    digitalWrite(ledPin, HIGH); //turn on
    delay(200);
    digitalWrite(ledPin, LOW); //turn off
  }
}

树莓派

C

#include <stdio.h>
#include <wiringPi.h>
#include <pcf8591.h>

#define PCF  120

int main (void)
{
    int value;
    int count = 0;
    wiringPiSetup();
    //setup pcf8591 on base pin 120, and address 0x48
    pcf8591Setup(PCF, 0x48);
    while(1) //loop forever
    {
         value = analogRead(PCF + 0);
         //printf("%d\n", value);
         if (value > 70){
            count ++;
            printf("Voice In!! %d\n", count);
        }
    }
    return 0;
}

Python

#!/usr/bin/env python
import PCF8591 as ADC
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)

def setup():
    ADC.setup(0x48)

def loop():
    count = 1
    while True:
        voiceValue = ADC.read(0)
        if voiceValue:
            print('Value:{}'.format(voiceValue))
        if voiceValue > 65:
            print("Voice detected! {}".format(count))
            count += 1
        time.sleep(0.2)


if __name__ == '__main__':
    try:
        setup()
        loop()
    except KeyboardInterrupt:
        pass