Chess clock

I was browsing the internet the other day, looking for a simple and efficient (web based) chess clock. To my suprise, I could not find one. Maybe I just didn't look in the right places, or maybe it's because there's a serious lack of good ones.

So, I decided to make one. I'm pretty happy with the result, I tried to keep it simple and clean. This is not a chess clock designed for online playing, but for when you're playing with a (real life) friend face to face.

www.chessclock.tk

or

http://www.chess.worldstrife.com

 Let me know what you think and maybe let me know what you're missing.

 Thanks!

EDIT, Here's a full list of features:

-  The duration of the game can differ per player; this way two players with a different rating can still face a challenge.

- As an alternative to the 'normal' chess clock, you can now make use of either the Fisher timing system or the Bronstein timing system. These systems add seconds to the clock after each move (they work in slightly different ways). Once again, the number of seconds added after each move if fully customizeable.

- The user can choose between the space bar and the CTRL keys to stop one timer and start the other. 

- Flipping the colors of the chess clock is easy. (Flipping the colors means that it's easy to  switch from white to black.)

- The clock is available online aswell as offline.

Here's a full list of features on my chess clock (I also updated my first post; this is the same list):

-  The duration of the game can differ per player; this way two players with a different rating can still face a challenge.

- As an alternative to the 'normal' chess clock, you can now make use of either the Fisher timing system or the Bronstein timing system. These systems add seconds to the clock after each move (they work in slightly different ways). Once again, the number of seconds added after each move if fully customizeable.

- The user can choose between the space bar and the CTRL keys to stop one timer and start the other. 

- Flipping the colors of the chess clock is easy. (Flipping the colors means that it's easy to  switch from white to black.)

- The clock is available online aswell as offline. 

how to start clock?

Very cool!

I'm thinking of building a physical chess clock as a gift for my son, hopefully using Nixie tubes for a nice retro vibe (see picture of a regular clock with nixie tubes, same idea). But as cool as it would be, would he be allowed to use it in serious OTB play? I rather suspect not as it would be extraordinarily easy to configure the clock to run at a slower speed for one side (which I wouldn't do, but there are those unscrupulous folks out there). Does anybody know if a homemade chess clock is tournament legal?

There doesn't seem to be too much scrutiny or standards WRT clocks that I've observed.  As for cheating, anybody can cheat with even store-bought clocks; just change the electronics inside while keeping the case/buttons/and display; not hard to do at all.  The more serious tournaments, they seem to supply everything though (incl clocks).

Oh, your clock cannot be deemed distracting.

Those tube displays looks distracting.

Thanks, good to know! Granted even an old school mechanical clock can have its movement tampered with to run fast or slow, so it stands to reason that the clocks would be provided at serious events. Strictly at home use, then.

I'd concede that this design would be a distraction, as having your own unique piece of kit is the whole reason for building one by hand rather than going store bought. 

You can try: https://chessclock.org  (mobile is supported).

A chess clock app is described in the 2013 Silman article, Dinos to the Slav.
http://www.uschess.org/content/view/12291/719/