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 loves me some Arduino. The only thing I don’t love — and I’m sure many of my fellow Arduino tinkerers would agree with me here — is buying or building a new shield (read: add-on board) every time I ...

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 ...