Introduction

In this article, I have explained about controlling LED using Arduino Mega 2560. Also, controlling the brightness of LED using Arduino Mega 2560 will be described.
Parts
  • Arduino Mega 2560
  • Potentiometer
  • BreadBoard
  • LED
Connection
Step 1: Connection from Potentiometer to Arduino Mega 2560:
  • The first pin of the potentiometer can be connected to the Gnd of the Arduino Mega 2560.
  • The second pin of the potentiometer can be connected to the Analog pin A0 of the Arduino Mega 2560.
  • The third pin of the potentiometer can be connected to the 5V of the Arduino Mega 2560.
Step 2: Connection From Potentiometer To Arduino Mega 2560:
  • Positive pin = 09
  • Negative pin = Gnd
Programming
  1. const byte POTENTIOMETER = 0;
  2. const byte CONTROL = 9;
  3. int reading;
  4. int value;
  5. void setup()
  6. {
  7. pinMode(CONTROL, OUTPUT);
  8. }
  9. void loop()
  10. {
  11. reading = analogRead(POTENTIOMETER);
  12. value = map(reading, 0, 1024, 0, 255);
  13. analogWrite(CONTROL, value);
  14. }
Explanation
  • When the potentiometer is adjusted the LED can be low to high
  • In the potentiometer we can see the brightness of the LED.
Output
Figure 1: Output
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