Using the Automatic Flashing Colourful LED Module KY-034 with Arduino

INTRODUCTION:

In this tutorial, we will learn about the KY-034 module, how it works and we will build a simple project using the KY-034 module and an Arduino.

AUTOMATIC FLASHING COLOURFUL LED MODULE KY-034:

The KY-034 Module will be our main component for this tutorial. This module has a flashing LED mounted on a breakout board with a resistor. Figure 1 shows the module as seen in fritzing.

PIN OUT:

The KY-034 module has three pins.

HOW DOES IT WORK?

The LED automatically flashes when power is applied and the light changes colour every flash.

PROJECT – ARDUINO LIGHT FLASHER:

After learning about the KY-034 module and how it works, it is now time to build a project using the module. Our project will supply power to the KY-034 module which will cause it to flash.

PROJECT COMPONENTS:

For this project, we need the following components:

• Arduino Uno board (1 pc.)
• KY-034 Automatic Flashing Colourful LED Module (1 pc.)
• Jumper wires

WIRING DIAGRAM:

Figure 2 shows the connection between the Arduino Uno and the KY-034 Automatic Flashing Colourful LED Module.

The KY-034 module pins are connected to the Arduino Uno board as follows:

CODE:

Below is the Arduino sketch for our project. I have added comments to explain important parts of the code. Save the code as KY-034.ino and upload it to your Arduino board.

// Arduino and KY-034 module

void setup() {
pinMode(8, OUTPUT); // module is connected to pin 8
}


void loop() {
digitalWrite(8, HIGH); // switch on red
delay(2000); // wait 2 seconds
digitalWrite(8, LOW); // switch off red
delay(2000); // wait 2 seconds
}

PROJECT TEST:

Apply power to your Arduino Uno board. The KY-034 module will blink repeatedly while changing colour for 2 seconds, switch-off for 2 seconds and process repeat indefinitely.