help with pin 16


I just started tinkering with Arduino by buying a kit from eBay which came with a set of lessons.

Somehow I got stuck on lesson #10 (link below)

The two LEDs work fine but the problem I am having is the mysterious digitalRead(16). It is referenced in the code (for the active buzzer) but not in connectivity schematics. I did some research and am not sure if pin #16 exists at all.

Can someone please help me understand how the buzzer is controlled and how all of this supposed to work?

Thanks a lot!

16 is the same as A2

A0 is D14
A1 is D15
A2 is D16

Thanks a lot! This helped me figure it out :slight_smile: