CODE:

#define BUZZER 12

#define PHOTORESISTOR A0

int PSensorValue=0;

int Threshold=900;

void setup() {

pinMode(BUZZER,OUTPUT);

pinMode(PHOTORESISTOR,INPUT);

Serial.begin(9600);

}

void loop() {

PSensorValue=analogRead(PHOTORESISTOR);

Serial.println(PSensorValue);

if(PSensorValue>900){

digitalWrite(BUZZER,HIGH);

}else{digitalWrite(BUZZER,LOW);}

}

I want that when the PsensorValue is higher than 900,the buzzer should work after 30seconds.I need the solution but WHITHOUT USING DELAY FUNCTION.

thank you

ENERA 9 ap) 9B DIGITAL (PWM-> TX1 XO O UNO ON TK RX ARDUINO POWER ANALOG IN