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!