I chess clock circuit

[Suanualejo]

I want to learn how to build a chess clock circuit

 

[AnalogKid]

There are many different kinds of chess clock designs and features. First, determine which feature you want.

Chess clock - Wikipedia

en.wikipedia.org

ak

 

[Nigel Goodwin]

Assuming you simply want a chess clock?, the obvious way is to use a micro-controller, and google finds numerous examples, such as:

Arduino Chess Clock - Multi-game Box

Arduino Chess Clock - Multi-game Box: CHECK OUT MY OTHER PROJECTS >> Alarm Clock with Infrared and Bluetooth Speakers Arduino Pedometer Watch, With Temperature, Altitude and Compass! Hey folks! After making an Arduino smartwatch just last week, I received many complaints,or tips, …

www.instructables.com

However, if it's a homework or class project, and must be done with hardware, then YOU need to do it or there's no point.