[Solved] What will be the output on the LED if the following Python code runs... What will be the output on the LED if the following Python code runs on a Raspberry Pi with an LED connected to GPIO pin 18? | Raspberry Pi

Raspberry Pi - LED and Button Projects

What will be the output on the LED if the following Python code runs on a Raspberry Pi with an LED connected to GPIO pin 18?

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)
GPIO.output(18, GPIO.LOW)

AThe LED will turn OFF

BThe LED will blink

CThe code will cause an error

DThe LED will turn ON

Step-by-Step Solution

Solution:

Step 1: Analyze the GPIO setup
Pin 18 is set as an output pin with GPIO.setup(18, GPIO.OUT).
Step 2: Check the output value
GPIO.output(18, GPIO.LOW) sets the pin to low voltage, turning the LED off.
Final Answer:
The LED will turn OFF -> Option A
Quick Check:
GPIO.LOW means LED off = D [OK]

Quick Trick: LOW means off, HIGH means on for LEDs [OK]

Common Mistakes:

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What will be the output on the LED if the following Python code runs on a Raspberry Pi with an LED connected to GPIO pin 18?