nRF Connect SDK Intermediate course - Lesson 4, Exercise 1 PWM terminology

RE: nRF Connect SDK Intermediate course - Lesson 4, Exercise 1 PWM terminology

AHaug — Fri, 17 Jan 2025 13:58:36 GMT

Again thank you for bringing this up. The courses should be updated shortly to reflect the change from using "duty cycle" to using "pulse"/"pulse width" instead when referring to a duration and no the ratio.

Kind regards,
Andreas

RE: nRF Connect SDK Intermediate course - Lesson 4, Exercise 1 PWM terminology

runsiv — Mon, 02 Dec 2024 11:48:29 GMT

Hi Glenn

Thanks for bringing this up. I will bring this up in devAcademy meeting on Wednesday.

Regards

Runar

RE: nRF Connect SDK Intermediate course - Lesson 4, Exercise 1 PWM terminology

Saxman58 — Mon, 02 Dec 2024 00:32:30 GMT

In Exercise 2 the problem is even worse, with the term duty cycle (which is a ratio or percentage) used instead of the pulse width (time, e.g.- msecs) throughout the exercise. The servo motor data sheet also incorrectly shows "duty cycle" on the timing diagram but with units of msecs. This is less surprising since it may have been translated from Chinese or something. But every control systems reference I've ever seen makes it clear that duty cycle is the ratio of the pulse width to the period, usually expressed as a percentage:

en.wikipedia.org/.../Duty_cycle