Raspberry Pi - GPIO Basics with Python
You want to connect a push button to a Raspberry Pi GPIO pin so that the pin reads LOW when pressed and HIGH when released without external resistors. Which setup should you use?
You want to connect a push button to a Raspberry Pi GPIO pin so that the pin reads LOW when pressed and HIGH when released without external resistors. Which setup should you use?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand button wiring with internal resistors
Enabling internal pull-up resistor makes pin HIGH by default; pressing button connects pin to ground making it LOW.Step 2: Apply to scenario
Enable internal pull-up resistor and connect button to ground matches this setup, allowing button press to read LOW without external resistors.Final Answer:
Enable internal pull-up resistor and connect button to ground -> Option CQuick Check:
Pull-up + button to ground = LOW when pressed [OK]
Quick Trick: Use pull-up resistor and ground button for LOW press [OK]
Common Mistakes:
- Using pull-down resistor expecting LOW on release
- Not connecting button correctly
- Assuming external resistor is always needed
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