A Seeeduino Nano microcontroller based smart lamp. Clap, tap or blow on it: it switches on and off.

Supplies

Items you need:

Seeedunino Nano board,
5V relay,
Grove sound sensor,
12V home-made led-board,
12V power supply connector,
a nice design ceramic tea light candle holder

Step 1:

Assembly of the circuit.

Step 2:

Upload the following code in Arduino IDE:

//Sound Lamp 1.0 VI 2021
//Grove - Sound sensor, relay, led lamp

const int Sound = A5;
const int D2 = 2;
long Value = 0;
bool LightOn;

void setup()
{
   Serial.begin(115200);
   pinMode(D2, OUTPUT); // initialize D2 pin as OUTPUT;
   Serial.println("Grove - Sound Sensor Warning program starts...");
   digitalWrite(D2, HIGH); // turn relay on
   Serial.println("Relay in, light on");
   delay(500);
   digitalWrite(D2, LOW); // turn relay off
   Serial.println("Relay off,light off");
}

void loop()
{
   Value=analogRead(Sound);
   Serial.println(Value);

   if (Value<=500){
     Serial.println("Halk"); 
   }
   else if (Value>500){
     Serial.println("Hangos");
     if (LightOn == false){
       LightOn = true;
       digitalWrite(D2, HIGH); // turn relay on
       Serial.println("Relay on, light on");
       Serial.println (LightOn);
       delay(100);      
     }
     else if (LightOn == true){
       LightOn = false;
       digitalWrite(D2, LOW); // turn relay off
       Serial.println("Relay off,light off");
       Serial.println (LightOn);
       delay(100);
     }
   }
   delay(100);
}

Remark: The sound value (variable: Value) have to be aligned to your environment (e.g. general noise at your place, how loud you normally clap your hand, etc.).

Step 3:

Cover the holes of the tea light candle holder with translucent adhesive foil.

Step 4:

Place the circuit in the lamp, use some adhesive to fix the parts, and connect it to the power supply (a 12V adapter is required).

Step 5:

If you clap now, the light is going to switch on. If you clap again it is goint to switch off again.

Have fun!