Raspberry Pi - GPIO Basics with Python
You want to read two buttons on GPIO pins 5 and 6. Button on pin 5 should read HIGH when pressed, and button on pin 6 should read LOW when pressed. How should you configure internal resistors?
You want to read two buttons on GPIO pins 5 and 6. Button on pin 5 should read HIGH when pressed, and button on pin 6 should read LOW when pressed. How should you configure internal resistors?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Determine resistor for pin 5
To read HIGH when pressed, use pull-down resistor so pin is LOW by default and goes HIGH when button connects to 3.3V.Step 2: Determine resistor for pin 6
To read LOW when pressed, use pull-up resistor so pin is HIGH by default and goes LOW when button connects to ground.Final Answer:
Pin 5 with pull-down resistor, pin 6 with pull-up resistor -> Option AQuick Check:
Pull-down for HIGH press, pull-up for LOW press [OK]
Quick Trick: Pull-down for HIGH press, pull-up for LOW press buttons [OK]
Common Mistakes:
- Mixing resistor types for desired button logic
- Using same resistor for both pins
- Ignoring button wiring polarity
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