Digital Output : Getting Started

1 Let’s Get Started..
2 Digital Output

Let’s Get Started..

Blinky is the “Hello World” of Physical Computing

How do we implement this?

Digital Output

Three functions to know…

C++	Blocks

C++

Blocks

pinMode(pin, INPUT/OUTPUT);

ex: pinMode(13, OUTPUT);

// NOTE: -> functions are CASE-sensitive

digitalWrite(pin, HIGH/LOW);

ex: digitalWrite(13, HIGH);

Note: The block above corresponds to digitalWrite(pin, HIGH); inserted into loop().

pinMode(pin, OUTPUT); will be inserted into setup() automatically.

C++	Blocks

C++

Blocks

delay(time_ms);
 
ex: delay(2500); // delay of 2.5 sec.

https://www.arduino.cc/en/Reference

Type (instead of copy-pasting, if you are new to C/C++) this code, click “Upload” and observe the built-in LED. You have just completed your first Arduino program!

C++	Blocks

C++

Blocks

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 13 as an output.
  pinMode(13, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() {
  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

Instead of using

it is fine to use

for pin 13.