tone() function for frequency generation in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to play a 440 Hz tone on pin 8.

Arduino

tone(8, [1]);

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

AdigitalWrite

BpinMode

C440

Ddelay

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name instead of a frequency number.

Confusing pin number with frequency.

The tone() function needs the pin number and the frequency in hertz. 440 Hz is the frequency for the A note.

2fill in blank

medium

Complete the code to stop the tone on pin 8.

Arduino

tone([1], 440);
// some delay here
noTone([1]);

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

A9

B7

C10

D8

Attempts:

3 left

💡 Hint

Common Mistakes

Using different pin numbers for tone() and noTone().

Using a pin number that is not connected.

The noTone() function stops the tone on the same pin where tone() was called. Here, pin 8 is used.

3fill in blank

hard

Fix the error in the code to play a 1000 Hz tone for 500 milliseconds on pin 6.

Arduino

tone(6, [1], 500);

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

Adelay

B1000

Ctone

DpinMode

Attempts:

3 left

💡 Hint

Common Mistakes

Using function names instead of frequency numbers.

Omitting the frequency argument.

The second argument of tone() is the frequency in hertz. 1000 Hz is the correct frequency to play.

4fill in blank

hard

Fill both blanks to play a 523 Hz tone on pin 5 for 1000 milliseconds.

Arduino

tone([1], [2], 1000);

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

A5

B523

C8

D440

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up pin number and frequency.

Using wrong frequency values.

The first blank is the pin number 5, and the second blank is the frequency 523 Hz (note C5).

5fill in blank

hard

Fill all three blanks to create a dictionary of notes with their frequencies and play the tone for 300 ms on pin 3 for the note 'E'.

Arduino

const int notes[] = { [1] };
int freq = notes[[2]];
tone(3, [3], 300);

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

A262, 294, 330

B2

Cfreq

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong index for the note.

Passing the frequency number directly instead of the variable.

The array contains frequencies for notes C, D, E (262, 294, 330). Index 2 is the third note 'E'. The variable freq holds the frequency to play.