In this project, I developed a system for controlling the brightness of an LED and the rotation angle of a servomotor using a potentiometer connected to an Analog-to-Digital Converter (ADC). The ...

The potentiometer sends an analog signal (0–1023) to pin A0. The Arduino reads this value and maps it to PWM range (0–255). The LED brightness is updated accordingly via analogWrite().

This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer. In my example the whole ...