DIY Chess Clock

One of the many unfinished (or unstarted) projects on my to do list, was building my own digital chess clock. I'd first thought about this in the early 1980's, but it never got beyond the concept stage, as I have no talent for basic electronics.
As components have become cheaper and more accessible, it has in fact become easier to pull this off. And rather than it being a heavy duty construction activity, a trip to the local electronics store should allow to by all the parts you need.
As for the actual building of a chess clock, this article "How to make a Chess clock with Arduino" provides you with the details. As the Arduino is programmable, you can extend the features of the clock if you wish, adding other time controls and playing modes if needed.