07 I Skill Lab: Interactivity lab

Illumination Sculptures (Summer 2025) | Activities
Arduino Guide
Circuits Code

Detaileed understanding of an LED circuit

Dina Chehab

Fading Light

Dina Chehab

int led = 9;

int brightness = 0;

int fadeAmount = 5;


void setup() {

  pinMode(led, OUTPUT);

}


void loop() {

  analogWrite(led, brightness);

  brightness = brightness + fadeAmount;

  if (brightness <= 0 || brightness >= 255) {

    fadeAmount = -fadeAmount;

  }

  delay(30);

}

LED with Pushbutton

Dina Chehab


Components and supplies

1 Breadboard (generic)

2 Resistor 1k ohm

5 Jumper wires (generic)

1 Arduino UNO

1 LED (generic)

1 pushbutton 



LED ON when button is pressed

arduino

LED is set to ON when the button is pressed.

1const int BUTTON = 2;
2const int LED = 3;
3int BUTTONstate = 0;
4
5void  setup()
6{
7  pinMode(BUTTON, INPUT);
8  pinMode(LED, OUTPUT);
9}
10
11void  loop()
12{
13  BUTTONstate = digitalRead(BUTTON);
14  if (BUTTONstate == HIGH)
15  {
16    digitalWrite(LED, HIGH);
17  } 
18  else{
19    digitalWrite(LED,  LOW);
20  }
21}

LED is OFF when button is pressed (Opposite effect)

arduino

LED is OFF when button is pressed (Opposite effect)

1const int BUTTON = 2;
2const int LED = 3;
3int BUTTONstate = 0;
4
5void  setup()
6{
7  pinMode(BUTTON, INPUT);
8  pinMode(LED, OUTPUT);
9}
10
11void  loop()
12{
13  BUTTONstate = digitalRead(BUTTON);
14  if (BUTTONstate == HIGH)
15  {
16    digitalWrite(LED, LOW);