Speaker tone through analog pin

[gabrielgabrielgabriel]

Hi all!

I don't have any free digital pins left on my proyect on a ARDUINO PRO MINI.
I have a three free analogs (A3,A6,A7).

A6-A7 are strictly analog on pro mini, so can't be used as digital

So, if i set the A3 as output, can i use the TONE() function on it?

The question arise because i understand that Tones can be played through digital/pwm pins only, but not sure...

Thanks in advance.
Gabriel

[jremington]

@gabrielgabrielgabriel

So, if i set the A3 as output, can i use the TONE() function on it?

Possibly, but the function requires an internal timer. You could write your own tone function, which would toggle A3 as a digital pin.

[DrDiettrich]

@gabrielgabrielgabriel

So, if i set the A3 as output, can i use the TONE() function on it?

Why do you bother asking instead of simply trying yourself?
Use a piezo for output, not a low impedance speaker.

AFAIK tone() is not restricted to PWM pins.

[gabrielgabrielgabriel]

Got it. Thanks.

[gabrielgabrielgabriel]

AFAIK tone() is not restricted to PWM pins.

Good

Because, this proyect is getting complex and i try to avoid "trial and error"

Thanks a lot