
// analog read from A0 then LED at 8 int LED = 8 ; void setup() { pinMode(LED,OUTPUT) ; Serial.begin(9600) ; } void loop() { int pot= analogRead(A0) ; Serial.print("pot= ") ; Serial.print(pot) ; float volt=(pot/1023.0)*5.0 ; Serial.print(" volt= ") ; Serial.println(volt) ; if(volt <=0.3) { digitalWrite(LED, HIGH) ; } else { digitalWrite(LED, LOW) ; } delay(50) ; }