555 piano

Small sized 555 timer based piano.

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Main goal of this project has been creating pretty designed 555 based piano in small form-factor. Many 555 piano are using 9V battery for supply. I use CMOS timer and for timer need only 3V supply.

First prototype PCB

All schematics and BOM list you can download from GitHub

Also thx to @oshpark who gave me help for producing PCB for my project with high quality ;)

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