How to build a Chess clock ?

[swjiten]

I'd like to build a chess clock, I mean those timers that count down a programmed time and everytime one player clicks on a button his time stops and the opponent's time starts counting down... any help please ?

 

[IanP]

It can be done in 101 ways ..
Here is an example based on 1s-555-timer, counters and BCD-7-segment ICs:
**broken link removed**
so the solution is purely in hardware, it requires no programming skills ..

IanP

 

[dava_2]

This is very simple.
https://www.ehow.com/how_4893964_digital-clock.html