PowerRelay20A.ino

/* 
 PowerRelay Module 12VDC sketch

 This is a simple sketch for triggering
 the contact of relay. Use digital pin 7
 for output.

gizDuino LIN-UNO is an
Arduino UNO Board and IDE
compatible.

Board Select: Arduino UNO


*/
int RELAY = 7;
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 7  as an output.
  pinMode(RELAY, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(RELAY, HIGH);   // turn the 7 on (HIGH is the voltage level)
  delay(2000);              // wait for 2 seconds
  digitalWrite(RELAY, LOW);    // turn the 7 off by making the voltage LOW
  delay(2000);              // wait for 2  seconds
}