How would you write a Python loop using PWMLED to gradually increase LED brightness from 0 to 1 over 5 seconds?

hard📝 Application Q8 of 15

Raspberry Pi - gpiozero Library

How would you write a Python loop using PWMLED to gradually increase LED brightness from 0 to 1 over 5 seconds?

AUse a for loop incrementing brightness by 0.1 every 0.5 seconds

BSet brightness to 1 immediately and wait 5 seconds

CUse a while loop setting brightness to random values between 0 and 1

DSet brightness to 0.5 and then to 1 after 5 seconds

Step-by-Step Solution

Solution:

Step 1: Understand gradual brightness increase
To smoothly increase brightness over 5 seconds, increment brightness in small steps with delays.
Step 2: Analyze options
Use a for loop incrementing brightness by 0.1 every 0.5 seconds correctly uses a for loop with increments of 0.1 every 0.5 seconds (0.1 * 10 steps = 1, 0.5s * 10 = 5s). Options B, C, and D do not implement a smooth gradual increase.
Final Answer:
Use a for loop incrementing brightness by 0.1 every 0.5 seconds -> Option A
Quick Check:
Increment brightness in steps with delays [OK]

Quick Trick: Increment brightness gradually with timed loop [OK]

Common Mistakes:

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