Code Analysis
- In the setup, you set the LED pin as an output and potPin as an input.
- In the loop, we need use the analogRead() function to read the analog voltage value from the potentiometer. This value will be between 0 and 1023, corresponding to the voltage applied to the potentiometer.
- Now we have to convert the potentiometer value (0-1023) to a suitable range for LED brightness (0-255).
pinValue = (255.0/1023.0)*potValue
or one can use direct map() function available in the Arduino library.
pinValue = map(potValue, 0, 1023, 0, 255);
- Finally, The analogWrite() function is used to regulate the brightness of the LED. It accepts values between 0 and 255, with 0 being off and 255 being full brightness.
LED Control with Potentiometer using Arduino
In the field of electronics and programming, controlling an LED with a potentiometer is important too. By varying the resistance of the potentiometer, you can change the brightness of the LED. We will interface an LED (light-emitting diode) to the Arduino UNO board. An LED is a simple diode that emits light with a forward bias. We control the brightness of an LED by interfacing a potentiometer with it. We write a program in the Arduino IDE and download it to the microcontroller board.