[Solved] You want to control two relays connected to GPIO pins 5 and 6 to turn ON a fan and a light respectively.... Which Python code correctly turns ON the fan and turns OFF the light? | Raspberry Pi

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You want to control two relays connected to GPIO pins 5 and 6 to turn ON a fan and a light respectively. The relays are active LOW. Which Python code correctly turns ON the fan and turns OFF the light?

AGPIO.setup(5, GPIO.OUT) GPIO.setup(6, GPIO.OUT) GPIO.output(5, GPIO.HIGH) GPIO.output(6, GPIO.HIGH)

BGPIO.setup(5, GPIO.OUT) GPIO.setup(6, GPIO.OUT) GPIO.output(5, GPIO.HIGH) GPIO.output(6, GPIO.LOW)

CGPIO.setup(5, GPIO.IN) GPIO.setup(6, GPIO.IN) GPIO.output(5, GPIO.LOW) GPIO.output(6, GPIO.HIGH)

DGPIO.setup(5, GPIO.OUT) GPIO.setup(6, GPIO.OUT) GPIO.output(5, GPIO.LOW) GPIO.output(6, GPIO.HIGH)

Step-by-Step Solution

Solution:

Step 1: Setup pins 5 and 6 as outputs
Both pins must be outputs to control relays: GPIO.setup(5, GPIO.OUT) and GPIO.setup(6, GPIO.OUT).
Step 2: Apply active LOW logic for relays
To turn ON the fan (pin 5), output LOW; to turn OFF the light (pin 6), output HIGH.
Final Answer:
Setup pins as output, output LOW on 5, HIGH on 6 -> Option D
Quick Check:
Active LOW ON = LOW, OFF = HIGH [OK]

Quick Trick: Active LOW ON means output LOW, OFF means HIGH [OK]

Common Mistakes:

MISTAKES

Setting pins as input instead of output
Reversing HIGH and LOW for active LOW relay
Turning both devices ON or OFF incorrectly

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More Raspberry Pi Quizzes

Which Python code correctly turns ON the fan and turns OFF the light?

Step 1: Setup pins 5 and 6 as outputs

Step 2: Apply active LOW logic for relays

Final Answer:

Quick Check:

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