PWM Example: Arduino Course 4.8

This video tutorial covers the use of Pulse Width Modulation (PWM) to control LED brightness using the Arduino platform. It explains the concept of PWM, how it affects LED brightness, and the physiological basis for perceived dimming. The tutorial includes a step-by-step guide to setting up the circuit and writing the Arduino sketch, with a focus on improving the code for smoother LED fading. The video concludes with a preview of future lessons that will explore more advanced uses of PWM.

What is the main purpose of using Pulse Width Modulation (PWM) with an LED?

Explain how the perceived brightness of an LED is affected by the duty cycle.

Describe the relationship between the duty cycle percentage and the brightness of the LED.

What happens to the LED when the duty cycle is set to 0%?

How does the human eye perceive the dimming effect of an LED using PWM?

What is the significance of the variable 'LED_PIN' in the Arduino sketch?

How can you modify the brightness of the LED in the code provided?

What is the effect of incrementing the brightness variable beyond its maximum value?

Explain the role of the delay function in the LED dimming process.

What changes would you make to the code to create a fading effect instead of a stepping effect?