Raspberry Pi - PWM Output
If a Raspberry Pi PWM signal has a frequency of 500 Hz and a duty cycle of 20%, what is the ON time duration in milliseconds per cycle?
If a Raspberry Pi PWM signal has a frequency of 500 Hz and a duty cycle of 20%, what is the ON time duration in milliseconds per cycle?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate period of one PWM cycle
Frequency = 500 Hz means period = 1 / 500 = 0.002 seconds = 2 ms per cycle.Step 2: Calculate ON time using duty cycle
ON time = duty cycle * period = 20% * 2 ms = 0.2 * 2 = 0.4 ms.Step 3: Re-check calculations
Wait, 20% of 2 ms is 0.4 ms, so 0.4 ms matches.Final Answer:
0.4 ms -> Option AQuick Check:
ON time = duty cycle x period [OK]
Quick Trick: ON time = duty cycle x (1/frequency) [OK]
Common Mistakes:
- Confusing frequency with duty cycle
- Calculating period incorrectly
- Mixing milliseconds and seconds
Master "PWM Output" in Raspberry Pi
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Raspberry Pi Quizzes