Week 3 Arduino Exercises

Buttons were pretty fun this week!

Here are the videos for exercises 1 and 2:

For the third one, I made a pretty fun RGB color mixer:

Code:

//LED pins
const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;
//button pins
const int redButton = 2;
const int greenButton = 3;
const int blueButton = 4; 
//initialize brightness values to 0
int redVal = 0;
int greenVal = 0;
int blueVal = 0;
//button press boolean
int redPress = 1;
int greenPress = 1;
int bluePress = 1;

void setup()
{
  //set LED pins to outputs
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  //set button pins to inputs  
  pinMode(redButton, INPUT);
  pinMode(greenButton, INPUT);
  pinMode(blueButton, INPUT); 
  //begin serial monitor
  Serial.begin(9600);
}

void loop()
{

//test if any of the brightness values are at maximum
//if so, reset to 0
if (redVal >= 255) {
  redVal = 0;
}
if (greenVal >= 255) {
  greenVal = 0;
}
if (blueVal >= 255) {
  blueVal = 0;
}

//set the LED colors to the current brightness values
setColor(redVal, greenVal, blueVal);
 
 //check whether or not a button is pressed
 redPress = digitalRead(redButton);
 greenPress = digitalRead(greenButton);
 bluePress = digitalRead(blueButton);

 //if the a control button is pressed, 
 //increase the corresponding brightness value by 5
 if (redPress == LOW) {
    redVal = redVal + 5;
    Serial.print("Red value is ");
    Serial.print(redVal);
    Serial.println();
 }
 if (greenPress == LOW) {
    greenVal = greenVal + 5;
    Serial.print("Green value is ");
    Serial.print(greenVal);
    Serial.println();
 }
  if (bluePress == LOW) {
    blueVal = blueVal + 5;
    Serial.print("Blue value is ");
    Serial.print(blueVal);
    Serial.println();
  }

//delay to slow the fade and increase control
  delay(100);
  
}

void setColor(int red, int green, int blue)
{
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}

Author: Hannah Rudin

MFA Candidate in Products of Design at the School of Visual Arts in NYC. Currently pursuing a thesis project on merging design and team-building practices to counter social and political polarization in America. View all posts by Hannah Rudin