Its my first attempt to work with relay I tried to test my relay with this simple code
int Relay = 2; void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
pinMode(Relay,OUTPUT);
}
void loop() {
digitalWrite(Relay,HIGH);
delay(1000);
digitalWrite(Relay,LOW);
delay(1000);
}
Connected to IN -> Digital 2 GND -> GND VCC -> 5V
The only thing is happened is the LED of the relay blinking in every sec. but can not hear the clicking sound from the relay box or testing with a multimeter's diode function the two(NC and COM) OUTs aren't close I tried to test other relays(from the same type) but does not do anything else.
thank you for your help What can be wrong?