[Solved] What will be the output on the LED connected to pin 12 after running this code snippet? import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(12, GPIO.OUT) pwm = GPIO.PWM(12, 500) pwm.start(75) | Raspberry Pi

Raspberry Pi - PWM Output

What will be the output on the LED connected to pin 12 after running this code snippet?

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(12, GPIO.OUT)
pwm = GPIO.PWM(12, 500)
pwm.start(75)

ALED will be at 75% brightness

BLED will blink slowly

CLED will be off

DCode will raise an error

Step-by-Step Solution

Solution:

Step 1: Analyze PWM setup
Pin 12 is set as output, PWM started at 500 Hz frequency with 75% duty cycle.
Step 2: Understand duty cycle effect on LED
75% duty cycle means LED is on 75% of the time, so it appears bright but not fully on.
Final Answer:
LED will be at 75% brightness -> Option A
Quick Check:
75% duty cycle = 75% brightness [OK]

Quick Trick: Duty cycle % = LED brightness % [OK]

Common Mistakes:

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What will be the output on the LED connected to pin 12 after running this code snippet?