Controlling Fan/LED Using Arduino Uno

Introduction

In this article I will explain about controlling Fan/LED using Arduino Uno. It will give the control of Fan/LED by potentiometer.

Parts

• Arduino Uno
• Potentiometer
• BreadBoard
• HookUp Wires
• LED

Connection

Step 1: Connection from Potentiometer to Arduino Uno.

• Take the first pin of potentiometer connected to the Gnd of the Arduino Uno.
• Take the second pin of Vin connected to the analog pin of A0 to Arduino Uno.
• Take the Third pin of Vcc to the 5v of Arduino Uno.

Step 2: Connection from LED to Arduino Uno.

• Positive pin = 09
• Negative pin = Gnd

Programming

const byte POTENTIOMETER = 0;
const byte CONTROL = 9;
int reading;
int value;
void setup()
{
   pinMode(CONTROL, OUTPUT);
}
void loop()
{
   reading = analogRead(POTENTIOMETER);
   value = map(reading, 0, 1024, 0, 255);
   analogWrite(CONTROL, value);
}

Explanation

• When we adjust the potentiometer the LED /Fan can be controlled.
• When the potentiometer is scrolling the brightness of the LED can be High/LOW.
• When the potentiometer is scrolling the Speed of the Fan also changes.

Output


            Figure 1: Output

 

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