5V 1 channel relay module for Arduino

- Maximum load: AC 250V / 10A, DC 30V / 10A
- Trigger current: 5mA
- Voltage: 5V
- Module size: 50 x 26 x 18.5 mm (L x W x H)
- DC +: positive power supply (VCC)
- DC-: negative power supply (GND)
- IN: can be high or low level control relay
- None: Normally open Relay Interface.
- COM: Relay common interface
- NC: normally closed relay interface.
- It is a low trigger when the jumper is connected to the LOW pin.
- It is a high level trigger when the jumper is connected to a high pin.
code basic------------
int relayPin = 8;
void setup() {
Serial.begin(9600);
pinMode(relayPin, OUTPUT);
}
void loop() {
digitalWrite(relayPin,LOW);
delay(500);
digitalWrite(relayPin,HIGH);