int   Relay_in = 7 ;
int  LED = 8 ;
int sw1 = 9;

void setup() {
  Serial.begin(9600);
pinMode(Relay_in , OUTPUT);
pinMode(LED, OUTPUT);
pinMode(sw1, INPUT_PULLUP);


Serial.println("Press Sw FOR ON");
}
void loop() {
  int ATTC_sw1 = digitalRead(sw1);
if (ATTC_sw1==LOW) {
  Serial.println("LED1 ON");
digitalWrite(Relay_in, HIGH); //ถ้า sw1 ถูกกด
} else {
digitalWrite(Relay_in, LOW);
}
delay(10);



}