Section 4.2 - PWM Pins
Some Finer Control
In this lesson, you will be introduced to Pulse Width Modulation (PWM), a technique used to control the brightness of an LED through varying the width of the pulses in a signal. The lesson begins with informative slides that explain the concept of PWM, including its applications in electronics. You will also learn where the PWM pins are located on the Arduino, providing a foundation for wiring and programming. Next, you will move to TinkerCAD, where you will wire an LED to one of the PWM pins on the Arduino. This hands-on activity will help reinforce the connection between PWM and LED brightness control. You will then explore the analogWrite function in Arduino programming, which allows you to set the brightness of the LED by varying the duty cycle of the PWM signal. As you adjust the values in the analogWrite function, you will observe how the brightness of the LED changes, providing a visual demonstration of PWM in action. By the end of this lesson, you will have a solid understanding of how to use PWM to control LED brightness and the role of the analogWrite function in Arduino programming.