Arduino Tutorial: Learn How to Control LED Brightness with PWM as breathing light.

Learning how to control LED brightness using Pulse Width Modulation (PWM) is an important skill for any beginner in Arduino programming.

The LED brightness is controlled by adjusting the duty cycle of the PWM signal. The duty cycle is the ratio of the time the signal is on to the total time of one cycle. The larger the duty cycle, the brighter the LED, and vice versa.