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 ...

I made this project because I wanted a way to automatically control the speed of a DC fan according to the temperature read by a LM35 sensor. I had a few problems with the PWM part mainly because the ...

In this tutorial, I will show you how to control the brightness of an LED or the speed of a DC fan using an Arduino board, a BC547 transistor, and a potentiometer. Follow along for a step-by-step ...