So, this was my idea:
I make a speaker with the simple idea of surrounding a paper cone with a tight wire and making the electricity go through it. But I wouldnt use it for simple mp3’s or something, but the µc would perform analogWrite to send a C4 or something like it.
This option is still my first choice. But I have looked all over the internet, and no-one seems to have tried this. What I need to know is: is the tone produced by the amount of voltage, or the amount of ampère? If so, is there a way to reduce the ampère in a sent signal from the µc?
Might the resisting be a problem? And if it is about ampère, does the world have ampère-measurers for sale?
Thank you in advance,