/diy/ - Do It Yourself

Hi guys,

For my circuits class, I want to build a piano/music for the final project. I want a circuit that can play chords/multiple notes at once, obviously the circuit in pic related does not do that. How would I go about producing multiple sine waves at once? I don't want to have a 555 timer for each note. Would it be as easy as summing all the sine waves produced by the notes with an op amp?

Forgive my ignorance, I am inexperienced.

>>718448

#1-Flyback driver
#2-Mini piano
#3-5 minute timer