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 ...

This Arduino sketch monitors the voltage output from a potentiometer connected to analog pin A0. It displays the voltage reading on the serial monitor and controls two LEDs based on the voltage level.

This project reads analog data from a potentiometer using an Arduino Uno, transmits the data via serial to a Python script, converts it to a voltage reading (0–5V), and visualizes it in real-time ...