Mood Lamp Using High Power RGB LED

Overview

The project shows the high power LED mood light design based on PIC16F628 microcontroller with the ability to produce PWM pulses wherein millions of color combinations are produced by varying pulse width.

Explanation

In this project, a rainbow of fading colors is capable of being produced by only one RGB LED. The fading or jumping between colors can be chosen as well as selecting a rainbow style or a random color changing behavior, pausing on a desired color, and choosing slow or fast changing of colors.  All the functions of the lamp can be handled with the aid of four switches. A suitable power supply unit is done making some power dissipation measurements. Extra care should be observed on the correct polarity and correct transistor mount or power source. A good mounting is using hot glue gun.

The LED used in this device is a high power 3W RGB LED but other high power types can also be used since it can do the task the same way. The light angle of the LED is 140° with a nominal current of 350mA. A simple PIC programmer can be used to program PIC16F628.