I have 2 new puppies who are only 10 weeks old.
They like to scratch the door and glass to say where am I.
Well I am probes lay at work but maybe I just want them to stay out a little longer.
I was thinking it's would be interesting to make a small buzzer alert when they try to scratch the door.
SO they scratch and something is triggered, a light, or s piezo buzzer or a speaker.
I have some sound modules for arduino like this
But i don't wank to alert in any sound, but the sound of the scratch?
I assume the need some sort of frequency monitor but I am not sure where to start?
Is there any projects that do this already?
If not any pointers would b appreciated.