Arduino Uno + Ethernet Shield + Buzzer: Low sound

Projects General Guidance
1

Hi!

My name is Alberto, and I have a little problem about the combo in the title:

I've an official Arduino Uno, and mounted on top an official Ethernet shield. I've wired a buzzer into digital pin 12, via an 220ohm resistor. It sound way to low.

As a workaround, using an analog pin (A1), it sound correctly loud.

I've discovered that a beep before Ethernet.begin works flawless, and after is really low in volume. It's pin 12 used by Ethernet Shield? Thank you :slight_smile:

2

Digital pins 10-13 are used by the SPI interface on the Uno. The SPI lines are used to communicate with the ethernet shield.

If that were a Mega, you would be ok.

3

Ok, that's more clear, then. Thank you :slight_smile: