Multiple LED patterns in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to turn on the LED connected to GPIO pin 17.

Raspberry Pi

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.OUT)
GPIO.output(17, [1])

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

A0

BTrue

CFalse

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using False instead of True turns the LED off.

Using 0 or None does not turn the LED on.

Setting GPIO.output to True turns the LED on.

2fill in blank

medium

Complete the code to make the LED blink once with a 1 second delay.

Raspberry Pi

import time
GPIO.output(18, True)
time.sleep([1])
GPIO.output(18, False)

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A1

B2

C0

D0.5

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 means no delay, LED turns off immediately.

Using 2 makes the LED stay on too long for this task.

Using 1 second delay makes the LED stay on for 1 second before turning off.

3fill in blank

hard

Fix the error in the code to blink the LED 3 times with 0.5 second intervals.

Raspberry Pi

for i in range(3):
    GPIO.output(22, [1])
    time.sleep(0.5)
    GPIO.output(22, False)
    time.sleep(0.5)

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A0

BNone

CFalse

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using False keeps the LED off.

Using None or 0 does not turn the LED on.

GPIO.output needs True to turn the LED on inside the loop.

4fill in blank

hard

Fill both blanks to create a dictionary mapping LED pins to their on/off status for a pattern.

Raspberry Pi

led_pattern = {17: [1], 27: [2]

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ATrue

BFalse

CNone

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using None or 0 does not correctly represent on/off states.

Using False for both turns off all LEDs.

The pattern turns on LED at pin 17 (True) and turns off LED at pin 27 (False).

5fill in blank

hard

Fill all three blanks to create a loop that cycles LEDs on pins 5, 6, and 13 on and off with 0.3 second delay.

Raspberry Pi

pins = [5, 6, 13]
for pin in pins:
    GPIO.output(pin, [1])
    time.sleep([2])
    GPIO.output(pin, [3])

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

AFalse

B0.3

CTrue

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 second delay is too long for this pattern.

Swapping True and False reverses LED states.

The loop turns each LED on (True), waits 0.3 seconds, then turns it off (False).