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What does Software PWM using RPi.GPIO.PWM allow you to control on a Raspberry Pi?

easy📝 Conceptual Q11 of 15
Raspberry Pi - PWM Output
What does Software PWM using RPi.GPIO.PWM allow you to control on a Raspberry Pi?
AThe temperature of the Raspberry Pi CPU
BThe file system permissions on the Raspberry Pi
CThe network speed of the Raspberry Pi
DThe brightness of LEDs or speed of motors by switching pins on and off quickly
Step-by-Step Solution
Solution:

  1. Step 1: Understand what PWM controls

    PWM (Pulse Width Modulation) controls how long a pin stays on versus off, affecting devices like LEDs or motors.

  2. Step 2: Identify the effect of switching pins fast

    Switching pins on and off quickly changes brightness or speed smoothly.

  3. Final Answer:

    The brightness of LEDs or speed of motors by switching pins on and off quickly -> Option D

  4. Quick Check:

    Software PWM controls brightness/speed = B [OK]
Quick Trick: PWM controls brightness or speed by fast switching [OK]
Common Mistakes:
  • Confusing PWM with CPU or network control
  • Thinking PWM changes file permissions
  • Assuming PWM controls temperature

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