PWM and analogWrite: Arduino Course 4.7

This video tutorial introduces the concept of pulse width modulation (PWM) and its application in controlling voltage output on an Arduino. The instructor uses a story about a pinwheel and a squirt gun to illustrate how PWM works by varying the duty cycle to control the speed of a DC motor or the brightness of an LED. The tutorial explains how to implement PWM using the analogWrite function on specific Arduino pins, detailing the relationship between duty cycle and apparent voltage. The video concludes with a brief overview of the analogWrite function's parameters and its ease of use.

What is the significance of using a garden hose in the analogy for PWM?

What is pulse width modulation (PWM) and how is it used in electronics?

Explain the concept of duty cycle in relation to PWM.

How does the duty cycle affect the apparent voltage seen by a circuit?

Describe how the analogWrite function works in Arduino.

What are the pin numbers on an Arduino that can be used with the analogWrite function?

How can you represent a 50% duty cycle using the analogWrite function?