const int sens = 50; // triggering value = 0.244 volts int ip = A0; // Set Analog input pin int op = 2; // Set Digital output pin void setup() { pinMode(op, OUTPUT); pinMode(ip, INPUT); Serial.begin(9600); } void loop() { Serial.print('\n'); Serial.print(analogRead(ip)); if( analogRead(ip) > sens) { digitalWrite(op, HIGH); delay(3000); digitalWrite(op, LOW); } delay(50); }