twain28:
Hello there everybody!I's my first official time here, but I've been lurking around the forums for almost a year, while trying to build up my custom arduino project...why, it's a clapper switch, of course!
Let's see...I started with a "simple" SINGLE CLAP ON/OFF LED LIGHT using the code I found on this Arduinonano-Clap-Switch instructables page/.
Code read as follows:int micpin=10;
int ledpin=12;
void setup() {
pinMode (micpin, INPUT);
pinMode (ledpin, OUTPUT);
}
void loop() {
if (digitalRead (micpin)==HIGH) {
if (digitalRead(ledpin)==LOW) {
digitalWrite (ledpin, HIGH);
} else {
digitalWrite(ledpin,LOW);
}
delay(1000);
}
}
This worked fine, so I went for the next step, turning it into a DOUBLE CLAP ON/OFF LED LIGHT, mixing the original code with a bit I found on a few different pages, such as [this HighVoltageCode page](https://www.highvoltagecode.com/post/arduino-clap-switch-controlling-home-appliances-with-a-double-clap) and [this 14Core page](https://www.14core.com/making-your-own-sound-activated-switch-on-arduino/). This way, I obtained the following code:int InputSound = 0;
int micpin = 10;
int ledpin = 12;
long DetectSpan = 0;
long SoundDetection = 0;
boolean lightState = false;
void setup() {
Serial.begin(9600);
pinMode (micpin, INPUT);
pinMode (ledpin, OUTPUT);
Serial.print("Microphone up and running");
}
void loop() {
int sensorState = digitalRead(micpin);
if (sensorState == 0)
{
if (InputSound == 0)
{
SoundDetection = DetectSpan = millis();
InputSound++;
}
else if (InputSound > 0 && millis()-DetectSpan >= 50)
{
DetectSpan = millis();
InputSound++;
}
}
if (millis() - SoundDetection >= 400)
{
if (InputSound == 2)
{
if (!lightState)
{
lightState = true;
digitalWrite(ledpin, HIGH);
Serial.print("Let there be light!");
}
else if (lightState)
{ /* altrimenti */
lightState = false;
digitalWrite(ledpin, LOW);
Serial.print("Lights of, please!");
}
}
InputSound = 0;
}
}
This worked as well...so I went for the big jump and changed the code to use a relay switch to POWER ON/OFF an extension cord. I adapted the code above mixing it with what I found on [this Create.Arduino page](https://create.arduino.cc/projecthub/mtashiro/the-clapper-09dc8a) and again on [the HighVoltage page](https://www.highvoltagecode.com/post/arduino-clap-switch-controlling-home-appliances-with-a-double-clap). Here's the final code:int InputSound = 0;
int micpin = 10;
int relaypin = 12;
long DetectSpan = 0;
long SoundDetection = 0;
boolean relayState = false;
void setup() {
Serial.begin(9600);
pinMode (micpin, INPUT);
pinMode (relaypin, OUTPUT);
Serial.print("Microphone up and running");
}
void loop() {
int sensorState = digitalRead(micpin);
if (sensorState == 0)
{
if (InputSound == 0)
{
SoundDetection = DetectSpan = millis();
InputSound++;
}
else if (InputSound > 0 && millis()-DetectSpan >= 50)
{
DetectSpan = millis();
InputSound++;
}
}
if (millis() - SoundDetection >= 400)
{
if (InputSound == 2)
{
if (!relayState)
{
relayState = true;
digitalWrite(relaypin, HIGH);
Serial.print("Let there be light!");
}
else if (relayState)
{
relayState = false;
digitalWrite(relaypin, LOW);
Serial.print("Lights off, please!");
}
}
InputSound = 0;
}
}
Now...this should work...and yet it does not! I chopped the power extension, then plugged the + cable (blue) to the C (in) and another piece of blue cable from the NO (out) nack to the plug...yet this does not work! I tried plugging in the arduino nano to its usb cable, and all of a sudden, the board turned on and seemed to work (nano, microphone and even relay turned on and I could CLAP CLAP ON/OFF the relay),but then, when I turn the relay itself off by double clapping, the electricity still flowed to the plug. What am I boing wrong? Please help! Tomorrow I'll provide an image of my setup, to better undersand it. Many thanks to everyone who can provide a solution.
is it a single relay by itself or a relay module board?