Connecting a 12V relay to Arduino

Step 8 The Program

The test program is just an edited version of the "Blink" example:

/*------------------------------------------------------------------------------------

• relaytest |
• Author: gandalfsz |
• Date: 18 Jan 2009 |
• Function: Toggles Pin 13 every 10 Seconds |

*/-----------------------------------------------------------------------------------

int outPin = 13;

void setup()
{
     pinMode(outPin, OUTPUT);
}

void loop()
{
     digitalWrite(outPin, HIGH);
     delay(10000);
     digitalWrite(outPin, LOW);
     delay(10000);
}