Premiering my Arduino.

Yesterday my Arduino with a programilla sencillito, control the intensity and an LED using a potentiometer, Debuts I have done this first application because I really want to change the color of a RGB and the program is very similar.

LEDs differ from incandescent bulbs, which vary its intensity by placing a resistance to decrease the voltage on the bulb itself, require another method since a high voltage on the LED difference implies a difference in small light. Therefore to modify the light that emits an LED used a trick, and is to send a stream of pulses in one of our Arduino PWM outputs.

To vary the pulse width we have potentiometer, our Arduino reads the entry of the potentiometer and says which is the pulse output and so regulate light. This system can be used to regulate the speed of a DC motor and spins of a stepping motor. In a LED RGB, comes being three LED each one of a color red, green and blue, we can obtain any color depending on the intensity of each color.