Why gpiozero simplifies hardware in Raspberry Pi - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the gpiozero library.

Raspberry Pi

from gpiozero import [1]

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AGPIO

BLED

CPin

DBoard

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'GPIO' which is not a class in gpiozero

Using 'Pin' or 'Board' which are not classes to control LEDs

The LED class is part of gpiozero and is used to control an LED easily.

2fill in blank

medium

Complete the code to create an LED object on GPIO pin 17.

Raspberry Pi

led = LED([1])

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A27

B5

C22

D17

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing pin numbers not matching the example

Confusing physical pin numbers with GPIO numbers

GPIO pin 17 is commonly used and matches the example to control the LED.

3fill in blank

hard

Fix the error in the code to turn the LED on.

Raspberry Pi

led.[1]()

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Aoff

Benable

Con

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'off' which turns the LED off

Using 'start' or 'enable' which are not gpiozero methods

The on() method turns the LED on in gpiozero.

4fill in blank

hard

Fill both blanks to create a Button on pin 2 and check if it is pressed.

Raspberry Pi

button = Button([1])
if button.[2]:
    print('Pressed!')

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A2

B3

Cis_pressed

Dpressed

Attempts:

3 left

💡 Hint

Common Mistakes

Using pin 3 instead of 2

Using 'pressed' which is not a gpiozero property

The Button class uses pin 2 here, and is_pressed is the property to check if the button is pressed.

5fill in blank

hard

Fill all three blanks to create a PWMLED on pin 18, set brightness to 50%, and turn it on.

Raspberry Pi

pwm_led = PWMLED([1])
pwm_led.[2] = [3]
pwm_led.on()

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A18

Bbrightness

C0.5

D17

Attempts:

3 left

💡 Hint

Common Mistakes

Using pin 17 instead of 18

Setting brightness to 1 instead of 0.5

Pin 18 is used for PWMLED, brightness controls the light level, and 0.5 sets it to 50% brightness.