You want to sweep a servo motor from 0° to 180° smoothly using PWM on Raspberry Pi. Which approach is best?

hard📝 Application Q15 of 15

Raspberry Pi - PWM Output

AUse a fixed duty cycle of 12.5% without delay

BSet duty cycle to 7.5% and wait for 5 seconds

CChange duty cycle gradually from 2.5% to 12.5% in small steps with delays

DChange frequency from 50 Hz to 100 Hz rapidly

Step-by-Step Solution

Solution:

Step 1: Understand servo sweeping method
Sweeping means moving smoothly from 0° to 180°, which requires changing duty cycle gradually.
Step 2: Identify correct PWM control
Duty cycle must change from about 2.5% (0°) to 12.5% (180%) in small steps with short delays for smooth motion.
Final Answer:
Change duty cycle gradually from 2.5% to 12.5% in small steps with delays -> Option C
Quick Check:
Smooth sweep = gradual duty cycle change [OK]

Quick Trick: Sweep by small duty cycle steps with delays [OK]

Common Mistakes:

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