LED Sequencer

Use LEDs to make cool effects.

Oct 19, 2020

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Components and supplies

5 mm LED: Yellow

5 mm LED: Red

5 mm LED: Green

Breadboard (generic)

Jumper wires (generic)

Resistor 1k ohm

Arduino UNO

Apps and platforms

Arduino IDE

Project description

Code

arduino

1int ledArray[] = {2, 3, 4, 5, 6, 7, 8, 9};
2
3int delayTime = 50;
4
5void  setup() {
6  //initialise ledArray as outputs
7  for (int i = 0; i < 10; i++)  {
8    pinMode(ledArray[i], OUTPUT);
9  }
10}
11
12void loop() {
13  //turn  LEDs on from 0-7
14  for (int i = 0; i <= 7; i++) {
15    digitalWrite(ledArray[i],  HIGH);
16    delay(delayTime);
17  }
18
19  //turn LEDs off from 7-0
20  for  (int i = 7; i >= 0; i--) {
21    digitalWrite(ledArray[i], LOW);
22    delay(delayTime  * 2);
23  }
24}

int ledArray[] = {2, 3, 4, 5, 6, 7, 8, 9};

int delayTime = 50;

void  setup() {
  //initialise ledArray as outputs
  for (int i = 0; i < 10; i++)  {
    pinMode(ledArray[i], OUTPUT);
  }
}

void loop() {
  //turn  LEDs on from 0-7
  for (int i = 0; i <= 7; i++) {
    digitalWrite(ledArray[i],  HIGH);
    delay(delayTime);
  }

  //turn LEDs off from 7-0
  for  (int i = 7; i >= 0; i--) {
    digitalWrite(ledArray[i], LOW);
    delay(delayTime  * 2);
  }
}

Downloadable files

Circuit Diagram

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ansh2919

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