Hi,
I want to build a puzzle box for my son’s graduation. I have far more woodworking skills than electronics skills but I see the Arduino as a nice simple tool to use as a clever locking mechanism for part of the puzzle box. He has a musical background so I would like one of the locks to require the playing of a particular tune. A very simple way to do it would be to make a single octave piano keyboard with Arduino buttons, play the correct sound for each with the tone() function and write a simple program to keep track of the sequence, actuating the servo to unlock the box if it is correct.
But then I got a better idea. Surely with all of the technology available today, that would allow one to play a tune on an instrument (piano, xylophone, whistling, whatever) into a microphone and the Arduino determine if it is the correct tune or not to unlock the box. Although I have a background in Fourier transforms in other contexts and in coding, I have no inclination to try to create such a thing, but I am hoping there is a simple solution. I saw an Instructable from 2012 that does such a thing but most of the associated files are no longer available and it was pre-Arduino / Raspberry Pi so involved building a complicated circuit board. https://www.instructables.com/id/A-Box-with-a-Music-Lock/
I have seen other tutorials on general sound detection (like a clap to activate something) but not musical note recognition. E.g. Interfacing Sound Sensor with Arduino - Add Sound Detection to Arduino - Add Sound Detection to Arduino
Any ideas?
Thanks!
Steve
