Modular Music Box Arduino polyphonic audio

Posted on Feb 7, 2014

Before I emailed Pablo Gian Villamil and he sent me on a link to his class notes (yay!) for Generating polyphonic sound with Arduino I tried to work out his circuitry from his various blog posts and component listings CMOS Hex Schmitt Trigger Inverter Integrated Circuit (74C14) or CMOS Quad NAND Gate Schmitt Trigger Integrated Circuit (CD4093)

Modular Music Box Arduino polyphonic audio
Click here to download the full size of the above Circuit.

(on the board but not using it 4093 4093B Quad 2-input Schmitt trigger NAND gate )

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