Study for the Internet of Things (IOT102) Test. Access comprehensive flashcards and multiple choice questions, each with hints and explanations. Get prepared for your exam!

Multiple Choice

How many PWM pins are present in the Arduino UNO?

PWM lets digital pins imitate an analog voltage by rapidly switching on and off with a controllable duty cycle. On the Arduino UNO, exactly six pins support PWM: 3, 5, 6, 9, 10, and 11. Each pair shares a hardware timer (Timer0 handles 5 and 6, Timer1 handles 9 and 10, Timer2 handles 3 and 11). When you use analogWrite on a PWM pin, the corresponding timer sets the duty cycle to produce the desired average voltage. So there are six PWM pins in total.

PWM lets digital pins imitate an analog voltage by rapidly switching on and off with a controllable duty cycle. On the Arduino UNO, exactly six pins support PWM: 3, 5, 6, 9, 10, and 11. Each pair shares a hardware timer (Timer0 handles 5 and 6, Timer1 handles 9 and 10, Timer2 handles 3 and 11). When you use analogWrite on a PWM pin, the corresponding timer sets the duty cycle to produce the desired average voltage. So there are six PWM pins in total.