Raspberry Pi - GPIO Basics with Python
Why is it important to use pull-up or pull-down resistors when reading digital inputs with GPIO.input?
Why is it important to use pull-up or pull-down resistors when reading digital inputs with GPIO.input?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand floating pins
Without pull-up/down resistors, input pins can float and read random HIGH or LOW.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 unpredictable values -> Option DQuick Check:
Pull resistors stabilize input readings [OK]
Quick Trick: Pull resistors stop floating inputs giving random values [OK]
Common Mistakes:
- Thinking pull resistors increase voltage
- Confusing input with output function
- Assuming pull resistors reduce current
- Ignoring floating input problem
Master "GPIO Basics with Python" in Raspberry Pi
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Raspberry Pi Quizzes