Writing HIGH and LOW to output pins in Embedded C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set pin 5 to HIGH.

Embedded C

digitalWrite(5, [1]);

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

AHIGH

BLOW

CINPUT

DOUTPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Using LOW instead of HIGH will turn the pin off.

Using INPUT or OUTPUT in digitalWrite is incorrect.

To set a pin to HIGH, use the constant HIGH in the digitalWrite function.

2fill in blank

medium

Complete the code to set pin 3 to LOW.

Embedded C

digitalWrite(3, [1]);

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

AOUTPUT

BLOW

CINPUT

DHIGH

Attempts:

3 left

💡 Hint

Common Mistakes

Using HIGH will turn the pin on instead of off.

Using INPUT or OUTPUT is wrong in digitalWrite.

To turn off the pin, use LOW in digitalWrite.

3fill in blank

hard

Fix the error in setting pin 7 to HIGH.

Embedded C

digitalWrite([1], HIGH);

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

ALOW

BHIGH

COUTPUT

D7

Attempts:

3 left

💡 Hint

Common Mistakes

Putting HIGH as the pin number causes errors.

Using OUTPUT or LOW as pin number is incorrect.

The first argument of digitalWrite must be the pin number, here 7.

4fill in blank

hard

Fill both blanks to set pin 9 as output and then write HIGH to it.

Embedded C

pinMode([1], [2]);
digitalWrite(9, HIGH);

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

A9

BLOW

COUTPUT

DINPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Using LOW or INPUT in pinMode instead of OUTPUT.

Using wrong pin number.

Use pinMode(9, OUTPUT); to set pin 9 as output before writing HIGH.

5fill in blank

hard

Fill all three blanks to set pin 4 as output, write LOW, then write HIGH.

Embedded C

pinMode([1], [2]);
digitalWrite(4, [3]);
digitalWrite(4, HIGH);

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

A4

BOUTPUT

CLOW

DINPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Using INPUT instead of OUTPUT in pinMode.

Writing HIGH instead of LOW in the second digitalWrite.

First set pin 4 as output with pinMode(4, OUTPUT);, then write LOW to turn it off, then HIGH to turn it on.