The circuit is very simple and inexpensive. It uses a microcontroller 12f675 and a 3 MOSFET number. 3 resistors 1K ohm, a 7805 voltage regulator, a 10K ohm variable resistor and a set of LED lamps. You will find the BCP design and drawing methods as well as the special program of the microcontrollers. The advantages of the circuit can be exploited in the installation of a fan desk or installed on the signs of light and appreciate the change of lighting and make the circuit works by changing the lighting aut