Arduino - flashing a LED - basic program - delay function.

This is the basic code that everyone learns as their first arduino project

The blinking LED

It uses the delay function.

 

This function is good for many cases, however it has a disadvantage that it can slow up the program.

However, for this sketch, its perfect.

 

 

The setup:

The cathode (short leg) of the LED connects to GND

The resistor is 220 Ohm

The anode connects to  pin 7 in this case.

 

 Here is the basic Code

 

void setup() {
    // put your setup code here, to run once:
    pinMode(7, OUTPUT); // configure the pin as an output
}
void loop() {
    // put your main code here, to run repeatedly:
    digitalWrite(7, HIGH); // turn LED on
    delay(1000); // wait 1 second
    digitalWrite(7, LOW); // turn LED off
    delay(1000); // wait one second
}

 ---------------------------------

+ Arduino Index 

-------------------------------------