Arduino/beginner/Lesson 1 /LED

1/*
2  Blink
3  Turns on an LED on for one second, then off for one  second, repeatedly.
4
5  Most Arduinos have an on-board LED you can control.  On the Uno and
6  Leonardo, it is attached to digital pin 13. If you're unsure  what
7  pin the on-board LED is connected to on your Arduino model, check
8  the documentation at http://www.arduino.cc
9
10  This example code is in the  public domain.
11
12  modified 8 May 2014
13  by Scott Fitzgerald
14 */
15
16
17//  the setup function runs once when you press reset or power the board
18void setup()  {
19  // initialize digital pin 13 as an output.
20  pinMode(13, OUTPUT);
21}
22
23//  the loop function runs over and over again forever
24void loop() {
25  digitalWrite(13,  HIGH);   // turn the LED on (HIGH is the voltage level)
26  delay(1000);              //  wait for a second
27  digitalWrite(13, LOW);    // turn the LED off by making the  voltage LOW
28  delay(1000);              // wait for a second
29}
30

1/*
2  Blink
3  Turns on an LED on for one second, then off for one
4  second, repeatedly.
5
6  Most Arduinos have an on-board LED you can control.
7  On the Uno and
8  Leonardo, it is attached to digital pin 13. If you're unsure
9  what
10  pin the on-board LED is connected to on your Arduino model, check
11
12  the documentation at http://www.arduino.cc
13
14  This example code is in the
15  public domain.
16
17  modified 8 May 2014
18  by Scott Fitzgerald
19 */
20
21
22//
23  the setup function runs once when you press reset or power the board
24void setup()
25  {
26  // initialize digital pin 13 as an output.
27  pinMode(13, OUTPUT);
28}
29
30//
31  the loop function runs over and over again forever
32void loop() {
33  digitalWrite(13,
34  HIGH);   // turn the LED on (HIGH is the voltage level)
35  delay(1000);              //
36  wait for a second
37  digitalWrite(13, LOW);    // turn the LED off by making the
38  voltage LOW
39  delay(1000);              // wait for a second
40}
41