![]() Pulse Width Modulation (PWM) is a technique for controlling input/putput varying the duty cycle of a square wave with the voltage of the signal. For example, by setting the PWM of red to 128 and the PWM of blue to 255 we can obtain purple. As the Arduino PWM can manage values from 0 to 255, we can associate this value with the amount of each color component to form different tints. We use PWM (pulse width modulation) to vary the brightness of the LEDs. As is well known, all the colors of the spectrum can be made from a combination of the fundamental colors red green and blue. In order for the correct operation of the RGB LED to occur, we use three resistors to limit the current passing through it.Īn RGB LED is a LED that has 3 different semiconductors inside, each capable of emitting a different color and in particular red, green and blue. The version with common anode uses 5V on the pin, while the second version with common cathode uses GND grounding on the pin. There are two different versions of RGB LEDs on the market, the first with common anode, and the second with common cathode. The use and connection (both electronically and programmatically) is not very different compared to traditional LEDs. The RGB LED can be considered as the union of three LEDs (one red, one green and one blue LED) in a singular structure. RGB LEDs can be a sparkling way to add originality and fun to your project. Arduino IDE: what it is and how it works #0.How can I use Arduino IDE to write a program? #1.Arduino IDE: variables, constants and macros #2. ![]()
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