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555 piano

Small sized 555 timer based piano.

alexander-ryzhkov

Alexander Ryzhkov

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Description
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Description

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.

Details

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 ;)

Project Logs

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Frequencies

Alexander Ryzhkov • 09/15/2017 at 20:07 • 0 comments

# of key	1/2 Period	Frequency real	Frequency
1	703uS	711Hz	C₆1046Hz
2	730uS	685Hz	B₅987Hz
3	787uS	635Hz	A₅880Hz
4	850uS	588Hz	G₅783Hz
5	927uS	539Hz	F₅698Hz
6	967uS	517Hz	E₅659Hz
7	1.04mS	480Hz	D₅587Hz
8	1.15mS	434Hz	C₅523Hz

Need to replace resistors and reverse buttons position.

DIY kit
Alexander Ryzhkov • 06/19/2017 at 19:19 • 0 comments

Diy kit for friend

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