Published November 26, 2018 © CC BY

Clap Switch with Relay

Clap twice to turn ON or OFF the load which is connected to relay.

BeginnerFull instructions provided18 minutes5,614

Things used in this project

Hardware components

Adafruit Microphone Amplifier Breakout

Arduino UNO

Relay (generic)

UTSOURCE Electronic Parts

everything above can be found here for a low price

Hand tools and fabrication machines

Soldering iron (generic)

Story

watch the video

Thanks UTSOURCE.net to offer electronic components for this project!

you can check UTSOURCE.net, they deal in all kinds of electronic components, for example, Arduino board, microphone module, and many more.

Code

Untitled file

int sound_sensor = A0;
int relay = 13;

int clap = 0;
long detection_range_start = 0;
long detection_range = 0;
boolean status_lights = false;
 
void setup() {
  pinMode(sound_sensor, INPUT);
  pinMode(relay, OUTPUT);
}
 
void loop() {
  int status_sensor = digitalRead(sound_sensor);
  if (status_sensor == 0)
  {
    if (clap == 0)
    {
      detection_range_start = detection_range = millis();
      clap++;
    }
    else if (clap > 0 && millis()-detection_range >= 50)
    {
      detection_range = millis();
      clap++;
    }
  }
  if (millis()-detection_range_start >= 400)
  {
    if (clap == 2 )
    {
      if (!status_lights)
        {
          status_lights = true;
          digitalWrite(relay, HIGH);
        }
        else if (status_lights)
        {
          status_lights = false;
          digitalWrite(relay, LOW);
        }
    }
    clap = 0;
  }
}