Project1 LED

Inspiration for this project came from ring lights in the below video from 0:22-0:28

And below you can download the video of my result.

Step 1: Step 1: Identify the Positive Side of Your LED

The positive side will have a longer metal leg than the negative.

Step 2: Step 2: Place LED in the Breadboard

Place the LED as such in your breadboard with the negative leg in the blue ground lane.

Step 3: Step 3: Add Resistor

For this example I am placing a 100 ohm resistor in the same column as the LED. To calculate what resistor is needed for your LED use the formula found at http://www.ohmslawcalculator.com/led-resistor-calculator.

Step 4: Step 4: Connect Wire to Breadboard

Connect a wire to the column that the LED and resistor are in.

Step 5: Step 5: Insert Wire Into Pin

With your Arduino board unplugged insert the other end of the wire into pin 3 on your board.

*Note for this project I am using pins 3,5,6,9,10,11 as they are the pins on my Arduino Uno board that have PWM indicated by the ~ next to the number, check your board's specifications to select pins that also have PWM.

Step 6: Step 6: Repeat

Repeat steps 2-5, 5 more times

Step 7: Step 6: Ground

Place a wire in the blue ground lane.

Step 8: Step 8: Ground Part 2

Insert the ground wire into the ground pin on your board.

Step 9: Step 9: Upload Code

You can now plug your Arduino into your computer and upload your code to it, or copy the code below.

/*
  Project1 LED Effect 
  Dims up multiple LEDs at once, then dims all down, then chases multiple LEDs in sequence.
  The circuit:
  - LEDs from pins 2 through 7 to ground
  created 2018
  by Steven Johnson
  
*/
int timer = 80;           // The higher the number, the slower the timing.
void setup() {
  // use a for loop to initialize each pin as an output:
  for (int thisPin = 2; thisPin < 12; thisPin++) {
    pinMode(thisPin, OUTPUT);
  }
}
void loop() {
  // iterate over the pins:
  for (int thisPin = 2; thisPin < 12; thisPin++) {
    // fade the LED on thisPin from off to brightest:
    for (int brightness = 0; brightness < 255; brightness++) {
      analogWrite(thisPin, brightness);
    }
  }
    
  // pause between LEDs:
  delay(1250);
   // fade the LED on thisPin from brightest to off:
    for (int brightness = 255; brightness >= 0; brightness--) {
      analogWrite(3, brightness);
      analogWrite(5, brightness);
      analogWrite(6, brightness);
      analogWrite(9, brightness);
      analogWrite(10, brightness);
      analogWrite(11, brightness);
      delay(2);
    }
  
  // loop from the lowest pin to the highest:
    // turn the pin on:
    analogWrite(3, 255);
    delay(timer);
    // turn the pin off:
    
   // turn the pin on:
    analogWrite(5, 255);
    analogWrite(3, 180);
    delay(timer);
    // turn the pin off:
    
    // turn the pin on:
    analogWrite(6, 255);
    analogWrite(5, 180);
    analogWrite(3, 80);
    delay(timer);
    // turn the pin off:
   
    // turn the pin on:
    analogWrite(9, 255);
    analogWrite(6, 180);
    analogWrite(5, 80);
    analogWrite(3, 0);
    delay(timer);
    // turn the pin off:
    
    // turn the pin on:
    analogWrite(10, 255);
    analogWrite(9, 180);
    analogWrite(6, 80);
    analogWrite(5, 0);
    delay(timer);
    // turn the pin off:
    // turn the pin on:
    analogWrite(11, 255);
    analogWrite(10, 180);
    analogWrite(9, 80);
    analogWrite(6, 0);
    delay(timer);
    // turn the pin off:
    // turn the pin on:
    analogWrite(3, 255);
    analogWrite(11, 180);
    analogWrite(10, 80);
    analogWrite(9, 0);
    delay(timer);
    // turn the pin off:
     // turn the pin on:
    analogWrite(5, 255);
    analogWrite(3, 180);
    analogWrite(11, 80);
    analogWrite(10, 0);
    delay(timer);
    // turn the pin off:
     // turn the pin on:
    analogWrite(6, 255);
    analogWrite(5, 180);
    analogWrite(3, 80);
    analogWrite(11, 0);
    delay(timer);
    // turn the pin off:
     // turn the pin on:
    analogWrite(9, 255);
    analogWrite(6, 180);
    analogWrite(5, 80);
    analogWrite(3, 0);
    delay(timer);
    // turn the pin off:
    
    // turn the pin on:
    analogWrite(10, 255);
    analogWrite(9, 180);
    analogWrite(6, 80);
    analogWrite(5, 0);
    delay(timer);
    // turn the pin off:
    // turn the pin on:
    analogWrite(11, 255);
    analogWrite(10, 180);
    analogWrite(9, 80);
    analogWrite(6, 0);
    delay(timer);
    // turn the pin off:
    // turn the pin on:
    analogWrite(11, 180);
    analogWrite(10, 80);
    analogWrite(9, 0);
    delay(timer);
    // turn the pin off:
     // turn the pin on:
    analogWrite(11, 80);
    analogWrite(10, 0);
    delay(timer);
    // turn the pin off:
     // turn the pin on:
    analogWrite(11, 0);
    delay(timer);
    // turn the pin off:
}