Multicolored LED Stream with Buzzer

Introduction

Hello again, everyone! Today I made a multicolored LED stream with a buzzer. This is a very good project for beginners that want to make something cool/interesting. The project uses 4 LEDS in the stream, one red, one blue, one yellow, and one green. Below is a video of the working project.

Step 1: Gather Necessary Materials

First, get the following materials.

• Arduino Board

• Active Buzzer

• 1 Red LED

• 1 Blue LED

• 1 Green LED

• 1 Yellow LED

• A breadboard

• Some Jumper wires

Before you move onto the hardware and software, here are some tutorials that may give an introduction to the components used.

• Click here for LED light tutorial

• Click here for Active Buzzer Tutorial

Step 2: Hardware Schematic

Here is the schematic for this project. The Digital IO wires for the LEDs are color-coded based on the color of the LED.

Next, we shall move onto the coding portion.

Step 3: Coding Software

Put this code into the Arduino IDE.

 //Digital Pins/Variables
int blueLED1 = 2; //Blue LED to Pin 2
int yellowLED2 = 3; //Yellow LED to Pin 3
int greenLED3 = 4; //Green LED to Pin 4
int redLED4 = 5; //Red LED to pin 5
int buzzer = 6; //Buzzer to pin 6
void setup() { //Setup Code
 pinMode(blueLED1, OUTPUT); //Blue LED as output
 pinMode(yellowLED2, OUTPUT); //Yellow LED as output
 pinMode(greenLED3, OUTPUT); //Green LED as output
 pinMode(redLED4, OUTPUT); //Red LED as output
 pinMode(buzzer, OUTPUT); //Buzzer as output
 digitalWrite(buzzer, HIGH); //Turn Buzzer on
}
void loop() { //Loop code
 digitalWrite(blueLED1, HIGH); //Blue led on
 delay(50); //wait for 1/25 of a second
 digitalWrite(blueLED1, LOW); //Blue led off
 digitalWrite(yellowLED2, HIGH); //Yellow led on
 delay(50); //wait for 1/25 of a second
 digitalWrite(yellowLED2, LOW); //Yellow led off
 digitalWrite(greenLED3, HIGH); //Green led on
 delay(50); //wait for 1/25 of a second
 digitalWrite(greenLED3, LOW); //Green led off
 digitalWrite(redLED4, HIGH); //Red led on
 delay(50); //wait for 1/25 of a second
 digitalWrite(redLED4, LOW); //Red led off
 digitalWrite(greenLED3, HIGH); //Green led on
 delay(50); //wait for 1/25 of a second
 digitalWrite(greenLED3, LOW); //Green led off
 digitalWrite(yellowLED2, HIGH); //Yellow led on
 delay(50); //wait for 1/25 of a second
 digitalWrite(yellowLED2, LOW); //Yellow led off
}

The explanations for the code are on each line.

Here is a breakdown of the functions used -

• int gives a name for the component that is connected to a digital pin. For example, intblueLED1=2; means that the blue led is connected to Digital IO pin 2. (See hardware schematic)

• pinMode sets something as an input or output. For example, pinMode(blueLED1,OUTPUT); sets the blue led as output.

• digitalWrite turns the components on and off. For example, digitalWrite(buzzer,HIGH); sets the buzzer on.

• delay creates a pause and goes by the time as if delay(1000); were 1 second. Therefore, delay(50); is 1/20 of a second. (I think my math is correct :D )

Upload the code, and give yourself a pat on the back. You have just completed the project! If something is not working, please comment in the section below.

If you enjoyed this project, please click here to view my other ones. Thank you!