Controlling Fan/LED Using Arduino Uno

Article

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