Custom characters on LCD in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a custom character on the LCD.

Arduino

byte smiley[8] = {0x00, 0x0A, 0x00, 0x00, 0x11, 0x0E, 0x00, [1];

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

A0x00

B0x1F

C0x10

D0x05

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-zero value for the last byte can distort the character shape.

The last byte in the custom character array is 0x00 to complete the 8-byte pattern.

2fill in blank

medium

Complete the code to load the custom character into the LCD memory.

Arduino

lcd.createChar([1], smiley);

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

A1

B0

C8

D16

Attempts:

3 left

💡 Hint

Common Mistakes

Using an index outside 0-7 causes errors or overwrites memory.

Custom characters are stored in locations 0 to 7 in LCD memory; 0 is the first slot.

3fill in blank

hard

Fix the error in the code to display the custom character on the LCD.

Arduino

lcd.setCursor(0, 0);
lcd.write([1]);

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

A0

B1

C'0'

Dsmiley

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the array name instead of the index.

Using character literals like '0' instead of numeric index.

lcd.write() expects the index of the custom character (0-7), not the array or character literal.

4fill in blank

hard

Fill both blanks to define and display a heart custom character on the LCD.

Arduino

byte heart[8] = [1];
lcd.createChar(1, [2]);

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

A{0x00, 0x0A, 0x1F, 0x1F, 0x1F, 0x0E, 0x04, 0x00}

Bsmiley

Cheart

D{0x00, 0x04, 0x0E, 0x1F, 0x1F, 0x0A, 0x00, 0x00}

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the wrong array or variable name to createChar.

Using incorrect byte patterns for the heart shape.

The heart array must be defined with the correct byte pattern and passed to createChar.

5fill in blank

hard

Fill all three blanks to create, store, and display a smiley face custom character at position (0,1).

Arduino

byte smiley[8] = [1];
lcd.createChar([2], smiley);
lcd.setCursor(0, [3]);
lcd.write([2]);

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

A{0x00, 0x0A, 0x00, 0x00, 0x11, 0x0E, 0x00, 0x00}

B0

C1

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the index for createChar and write.

Incorrect cursor position for displaying the character.

Define the smiley array, store it at index 0, then set cursor to column 0, row 1, and write the character at index 0.