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Identify the error in this PWM setup code on Raspberry Pi:

medium📝 Debug Q6 of 15
Raspberry Pi - PWM Output
Identify the error in this PWM setup code on Raspberry Pi:
GPIO.setup(17, GPIO.OUT)
pwm = GPIO.PWM(17)
pwm.start(75)
ADuty cycle value is too high
BPin 17 not set as output
CMissing frequency argument in GPIO.PWM()
Dstart() method requires frequency
Step-by-Step Solution
Solution:

  1. Step 1: Check GPIO.PWM() parameters

    GPIO.PWM() requires two arguments: pin and frequency.

  2. Step 2: Identify missing frequency

    Code only passes pin 17, missing frequency argument causes error.

  3. Final Answer:

    Missing frequency argument in GPIO.PWM() -> Option C

  4. Quick Check:

    GPIO.PWM needs pin and frequency [OK]
Quick Trick: Always provide frequency when creating PWM instance [OK]
Common Mistakes:
  • Forgetting frequency argument
  • Confusing duty cycle limits
  • Assuming start() needs frequency

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