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 ... Do not power the ...

If your board has no printed labels, check out its pinout diagram documentation (found on the board's Arduino Store page ... is using an analog input like a potentiometer. In this case, the ...

The FM modulator circuit (frequency modulation) is built with a Motorola MC1648P oscillator. Two varactors, Motorola MV-209 are used to frequency modulate the oscillator. The 5000 Ω potentiometer ...