Single LED control in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the GPIO library.

Raspberry Pi

import [1] as GPIO

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ARPi.GPIO

Bgpiozero

Ctime

Dos

Attempts:

3 left

💡 Hint

Common Mistakes

Importing unrelated libraries like 'time' or 'os'.

Using 'gpiozero' which is a different GPIO library.

The RPi.GPIO library is used to control the GPIO pins on a Raspberry Pi.

2fill in blank

medium

Complete the code to set the GPIO mode to BCM numbering.

Raspberry Pi

GPIO.setmode([1])

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AGPIO.BOARD

BGPIO.IN

CGPIO.OUT

DGPIO.BCM

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.BOARD instead of GPIO.BCM.

Confusing mode constants with pin direction constants.

Using GPIO.BCM sets the pin numbering to the Broadcom SOC channel numbers.

3fill in blank

hard

Fix the error in setting up pin 18 as output.

Raspberry Pi

GPIO.setup(18, [1])

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AGPIO.OUT

BGPIO.PWM

CGPIO.INPUT

DGPIO.IN

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.IN or GPIO.INPUT which are for input pins.

Using GPIO.PWM which is for pulse-width modulation, not basic output.

To control an LED, the pin must be set as an output using GPIO.OUT.

4fill in blank

hard

Complete the code to turn the LED on connected to pin 18.

Raspberry Pi

GPIO.output(18, [1])
GPIO.cleanup()

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AGPIO.HIGH

BGPIO.LOW

C18

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.LOW to turn the LED on (it turns it off).

Passing the pin number to cleanup which expects no arguments.

Setting the pin to GPIO.HIGH turns the LED on. The GPIO.cleanup() function is called without arguments to reset all pins.

5fill in blank

hard

Fill all three blanks to blink the LED once with a 1 second delay.

Raspberry Pi

GPIO.output([1], GPIO.HIGH)
time.sleep([2])
GPIO.output([3], GPIO.LOW)

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A18

B1

C17

D0.5

Attempts:

3 left

💡 Hint

Common Mistakes

Using different pin numbers for on and off.

Using too short or too long delay values.

The LED is connected to pin 18, so we set pin 18 HIGH, wait 1 second, then set pin 18 LOW to blink once.