Buzzer affect pin 3 and 11

Official Hardware Classic UNO R3
1

I am new to Arduino, when i use buzzer while using pins 3 and 11 to output an analog signal the buzzer make the signal goes to 0 (buzzer makes pin 3 and 11 stop outputting analog signal), when i use digitalWrite(); nothing like that happens why ?

forgive me for my bad English :slight_smile:

Update: i figured out that arduino has timers in it, timers help produce sound and analog signal, pin 3 and 11 share the same timer which is timer 2, and in arduino buzzer uses timer 2 also, thats why it was working in a weird way, i thought that updating the forum will help other people :slight_smile:

2 Likes
2

A digitalWrite() disables the timer for that pin.

IMO it were sufficient instead to only disable the CompareOutput mode on the related channel, returning the pin to normal port operation.

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This is stated in the documentation of the tone command

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yep, didn't read it, guess i should give attention to the documentation more, thank you

5

thanks for the advice, didn't study about CompareOutput yet :slight_smile:

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