O Level Exam : Practical Question
📝 HTML
🎨 CSS
⚡ Java Script
void setup() { Serial.begin(9600); pinMode(13,OUTPUT); pinMode(8,OUTPUT); pinMode(A0,INPUT); } void loop() { int signal; signal=analogRead(A0); Serial.println(signal); if(signal>=400) { tone(8,1000); digitalWrite(13,HIGH); delay(100); noTone(8); digitalWrite(13,LOW); delay(100); Serial.println("ALARM ACTIVATED"); } else { noTone(8); digitalWrite(13,LOW); Serial.println("ALARM DEACTIVATED"); } }
▶ Run Code
🖥 Output: