Pull-up and pull-down resistors in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a GPIO pin as input with a pull-up resistor.

Raspberry Pi

GPIO.setup(17, GPIO.IN, pull_up_down=[1])

Drag options to blanks, or click blank then click option'

AGPIO.PUD_DOWN

BGPIO.IN

CGPIO.OUT

DGPIO.PUD_UP

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.PUD_DOWN instead of GPIO.PUD_UP

Setting pin as output instead of input

Using GPIO.PUD_UP enables the pull-up resistor on the input pin.

2fill in blank

medium

Complete the code to read the state of a GPIO pin configured with a pull-down resistor.

Raspberry Pi

state = GPIO.input([1])

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AGPIO.OUT

BGPIO.PUD_DOWN

C18

DGPIO.IN

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.PUD_DOWN instead of pin number

Using GPIO.IN as argument

The pin number (e.g., 18) is needed to read its state with GPIO.input().

3fill in blank

hard

Fix the error in the code to correctly set a GPIO pin with a pull-down resistor.

Raspberry Pi

GPIO.setup(22, [1], pull_up_down=GPIO.PUD_DOWN)

Drag options to blanks, or click blank then click option'

AGPIO.IN

BGPIO.PUD_UP

CGPIO.OUT

DGPIO.PUD_DOWN

Attempts:

3 left

💡 Hint

Common Mistakes

Setting pin as output

Using pull-up resistor instead of pull-down

The pin must be set as input (GPIO.IN) to use pull-down resistors.

4fill in blank

hard

Fill both blanks to create a dictionary mapping pin numbers to their pull resistor types.

Raspberry Pi

pin_resistors = {17: [1], 18: [2]

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AGPIO.PUD_UP

BGPIO.OUT

CGPIO.PUD_DOWN

DGPIO.IN

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.OUT or GPIO.IN as resistor types

Pin 17 uses a pull-up resistor, and pin 18 uses a pull-down resistor.

5fill in blank

hard

Fill all three blanks to set up pin 23 as input with pull-up resistor and read its state.

Raspberry Pi

GPIO.setup([1], [2], pull_up_down=[3])
state = GPIO.input(23)

Drag options to blanks, or click blank then click option'

A23

BGPIO.IN

CGPIO.PUD_UP

DGPIO.OUT

Attempts:

3 left

💡 Hint

Common Mistakes

Setting pin as output

Using pull-down resistor instead of pull-up

Pin 23 is set as input with a pull-up resistor before reading its state.