I searched online and didn't find an open source Chess Clock so i decided to make my own and document the process on instructables. You can check out the guide on assembly and how to connect everything together over there.

[https://www.instructables.com/Chess-Clock-Open-Source-3D-Printed-and-Powered-by-/](https://www.instructables.com/Chess-Clock-Open-Source-3D-Printed-and-Powered-by-/)

[https://www.youtube.com/playlist?list=PLMbe2Ffh0wwDZDhNn1nwopZOGM2DcUtMO](https://www.youtube.com/playlist?list=PLMbe2Ffh0wwDZDhNn1nwopZOGM2DcUtMO)

You can print the buttons even without a multy meterial system. The icons are 1 layer high. First print only the icons then slap the filament and print the rest.