Arduino Sensors: Big and Small sound sensor (sound triggered switch)

Today I'll show you how to setup and use the big and small sound sensors to control a relay, LED or anything else you want to control.

[aryeguetta]

Great Demonstration, I am not sure if you know already but these sensors are called KY-038. Thanks for sharing.

[jonassamyn]

#define led 13
#define sound 3
boolean trig = true;
boolean state = true;

void setup()
{
pinMode(led, OUTPUT);
pinMode(sound, INPUT);
Serial.begin(9600);
}

void loop()
{
trig = digitalRead(sound);
if(trig == false && state == false)
{
digitalWrite(led, HIGH);
Serial.println("ON");
state = true;
delay(500);
}
else if(trig == false && state == true)
{
digitalWrite(led, LOW);
Serial.println("OFF");
state = false;
delay(500);
}
}

here ya go people I wrote it for you (-:

[BDominoes]

Thanks so much. I'm doing a mark Rober project, and I'm no expert

[jefferyhammond]

How can I use this in a system that deters barking dogs? I currently have a system I wired together that runs high pitch piezo tweeter speakers on a remote but that doesn't work when I'm not home to activate it. The over the counter bark deterrents are useless. I need it to stay on for 30 seconds when it detects noise but no shut off when it detects the second bark. Any ideas?

[chulainnolenain]

Does this code work on Mac pr is it just PC?

[jerzyszczepanski]

Hi. Could anybody please post a build of Arduino decibel meter for an Airgun with shown Max last reading. Small size would be preferable, possibly Arduino Nano and Oled screen. Most Android Phone Apps don't work correctly as the phone kills the Microphone sensitivity automatically and sampling isn't fast enough. Thanks in advance. Good Video BTW.

[donaldtessman]

I'm having a bit of trouble understanding what the Comparison Operator is in the IF and ELSE IF statements are...? Can you help me out? I have input your code into my IDE but can't complete the program properly at these points. I'm not sure what to input here...Help Please...