Raspberry Pi - PWM Output
Which Python command correctly initializes PWM on GPIO pin 18 at a frequency of 1000 Hz using the RPi.GPIO library?
Which Python command correctly initializes PWM on GPIO pin 18 at a frequency of 1000 Hz using the RPi.GPIO library?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Check RPi.GPIO PWM syntax
The correct syntax is GPIO.PWM(pin_number, frequency).Step 2: Match parameters
Pin 18 and frequency 1000 Hz must be in that order.Final Answer:
pwm = GPIO.PWM(18, 1000) -> Option BQuick Check:
Is pin first and frequency second? Yes. [OK]
Quick Trick: GPIO.PWM(pin, frequency) initializes PWM [OK]
Common Mistakes:
- Swapping pin and frequency arguments
- Using setup() instead of PWM()
- Calling non-existent startPWM() function
Master "PWM Output" in Raspberry Pi
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