[Solved] Why is it important to use pull-up or pull-down resistors with Raspberry Pi GPIO inputs? — Ans: To prevent the input pin from floating and reading random values | Raspberry Pi

Raspberry Pi - GPIO Basics with Python

Why is it important to use pull-up or pull-down resistors with Raspberry Pi GPIO inputs?

ATo disable the pin when not in use

BTo increase the voltage supplied to the pin

CTo allow the pin to output higher current

DTo prevent the input pin from floating and reading random values

Step-by-Step Solution

Solution:

Step 1: Understand floating pins
Without pull-up/down resistors, input pins can float, causing unpredictable readings.
Step 2: Role of pull-up/down resistors
They fix the pin voltage to a known state (HIGH or LOW) when no input is connected.
Final Answer:
To prevent the input pin from floating and reading random values -> Option D
Quick Check:
Pull resistors prevent floating inputs [OK]

Quick Trick: Pull resistors stop random input readings [OK]

Common Mistakes:

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