Why do we use PWM (Pulse Width Modulation) on a Raspberry Pi to control devices like LEDs instead of just turning them fully on or off?

easy📝 Conceptual Q11 of 15

Raspberry Pi - PWM Output

ABecause PWM is the only way to turn devices on.

BBecause PWM makes the Raspberry Pi run faster.

CBecause PWM simulates different power levels by switching on and off quickly, making devices appear dimmer or brighter.

DBecause PWM uses less electricity than turning devices fully on.

Step-by-Step Solution

Solution:

Step 1: Understand what PWM does
PWM switches power on and off very fast to create the effect of different power levels.
Step 2: Compare PWM to simple on/off
Simple on/off only gives full power or no power, so devices can't appear dim or partially powered.
Final Answer:
Because PWM simulates different power levels by switching on and off quickly, making devices appear dimmer or brighter. -> Option C
Quick Check:
PWM simulates analog power = Because PWM simulates different power levels by switching on and off quickly, making devices appear dimmer or brighter. [OK]

Quick Trick: PWM controls brightness by fast on/off switching [OK]

Common Mistakes:

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