Delaney Brummond

For Assignment 3 we had four different tasks, each a combination of code and hardware. In this post I will begin with an explanation, show my code, and then link to the video.

Part 1:

We were tasked with adding a second LED and make them flash like a railroad crossing. I did this using a delay in between the on and off for the individual pins but no delay in between the two pins.

void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(13, HIGH);     // turn led on (high is voltage level)
  delay(1000);                 // wait for 1 second
  digitalWrite(13, LOW);      // turn led off by making voltage low
  digitalWrite(11, HIGH);     
  delay(1000);                 
  digitalWrite(11, LOW);      
}

Part 2:

Next I added a third LED, and did an airport landing strip. I found this to be fun and interesting, I definitely am wondering what else I could do and looking forward to learning more.

void setup() {
  pinMode(13, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);     // turn led on (high is voltage level)
  delay(100);                 // wait for .1 second
  digitalWrite(13, LOW);      // turn led off by making voltage low
  digitalWrite(11, HIGH);     
  delay(100);                 
  digitalWrite(11, LOW);     
  digitalWrite(9, HIGH);
  delay(100);
  digitalWrite(9, LOW);
  delay(2000);
}

Part 3:

Next, I changed the numbers in the delay to be a variable, rather than a hard coded number. The var variable increments by 400 each time the loop runs, and once it reaches 2000 it will reset and go back to 0. The video shows how it gets slower between the lights blinking and then eventually gets faster again.

int var = 0;

void setup() {
  pinMode(13, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);     // turn led on (high is voltage level)
  delay(var);                 // wait for var
  digitalWrite(13, LOW);      // turn led off by making voltage low
  digitalWrite(11, HIGH);   
  delay(var);              
  digitalWrite(11, LOW);
  digitalWrite(9, HIGH);
  delay(var);
  digitalWrite(9, LOW);
  if(var<2000){
    var += 400;
  }
  else{
    var = 0;
  }
}

Part 4:

Finally, we used a fritzing diagram provided to us to make sure we understood how to orient the LEDs and the wires to make a more simple circuit. The LEDs also blink back and forth, similarly to part 1, but with much fewer wires and much less complicated. It uses the wires to switch back and forth between being an output wire or being a grounding wire.

void setup() {
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);
  delay(700);
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  delay(700);
  digitalWrite(12, LOW);
}

This assignment was a bit harder, and I definitely wanted to do more than I ended up accomplishing. However, I did get the mouse clicks to store after clicking and hitting a key, and then after that a different code would load it in and then show where you clicked. I was hoping to get it to a point where it would wait after each square and show in order where you would click.

I also considered trying to get it into one file instead of two, but wasn’t able to do that either!

I was overall happy with how it turned out but frustrated that I was unable to do more.

int xCoord=400; 
int yCoord=400;
int numCoord = 0;
PrintWriter mouseInput;

void setup() {
  size(800, 800);
  mouseInput = createWriter("coordinates.txt");
}


void draw() {
  background(#15C2D3);

  textSize(20);
  text("Click around, then hit any key", 385, 370);

  square(xCoord-25, yCoord-25, 50);

  if (mousePressed && mouseX > 25 && mouseX < 775 && mouseY > 25 && mouseY < 775) {

    xCoord= mouseX;
    yCoord = mouseY;
    
    mouseInput.println(mouseX);
    mouseInput.println(mouseY);
    numCoord ++;
    delay(300);
  }
}

void keyPressed(){
  mouseInput.flush(); //flushes printWriter object, writes the data before it closes
  mouseInput.close();
  exit();
}

String [] coords; // square brackets indicates it's an array. multiple values in one
void setup() {
  size(800, 800);
  coords = loadStrings("coordinates.txt");
  
  background(#15C2D3);
}

void draw(){
  textSize(15);
  text("This is where you clicked :)", 240, 240);
  
  for (int x = 0; x < coords.length; x += 2) {
    int y = x + 1;
    square(float(coords[x])-25, float(coords[y])-25, 50);
  }
}

Our first assignment in Object was to explore processing and figure out different ideas. I ended up doing three different code snippets, with small things changed.

1. I started with drawing squares when the mouse is pressed, with a random RGB color for each square and a white stroke.

void setup() {
  // width, height
  size(1000, 800);

  // 0-255, R, G, B
  background(0);
}

void draw() {

  if (mousePressed) {
    // white outline
    stroke(255);
    // random RGB color between 1&255
    fill(random(1, 255), random(1, 255), random(1, 255));
    square(mouseX, mouseY, 25);
  }
}

2. I next wanted to experiment with shapes, and wanted to do a similar drawing feature with triangles. I ended up coming across this accidentally but really enjoyed how it functioned.

void setup() {
  // width, height
  size(1000, 800);

  // 0-255, R, G, B
  background(0);
}

void draw() {

  if (mousePressed) {
    // white outline
    stroke(255);
    // random color
    fill(random(1, 255), random(1, 255), random(1, 255));
    // triangle using base point
    triangle(mouseX, mouseY, mouseX, 25, 25, 25);
  }
}

3. Another happy accident was similar to #2 but lines, rather than triangles. There is an attachment point and then the mouse click draws lines depending on where you click.

void setup() {
  // width, height
  size(1000, 800);

  // 0-255, R, G, B
  background(255, 0, 0);
}

void draw() {

  if (mousePressed) {
    stroke(255);
    triangle(mouseX, mouseY, mouseX, mouseY, 0, 0);
  }
}

Finally, I was experimenting with trying to select a background color by moving the mouse around, but I was unsure how to make the code stop updating the background color (on click, or key press perhaps) and put something from draw( ) to setup( ). Not sure if this is possible, but it would be really interesting. I love the updating background color based on X, Y positions of the mouse.

Overall, I had a lot of fun with this assignment and am looking forward to learning more about Processing and different types of outputs.