Do any digital clocks support a single repeated time control?

Im wondering if there are any digital clocks on the market that support a single non-sudden death time control.  An example would be a clock that supported 30/60 (30 moves in 60 minutes) that would automatically tack on an extra hour every 30 moves.

Thanks in advance for any info.

I don’t know

Your question got me curious to whether any of my clocks can be set that way.
I have three: two newer purchased within the last two years, and an older one from about twenty years ago.

Neither of the two newest clocks could be set that way, one of which is a DGT 2500, and the other some generic model with a manual written in very poor english. I tried for an hour, and as best I could tell both only have the capability to choose one, two, three or four time periods. You can customize each period for certain number of moves per time period, but that seems to be the literal limit of it:

- one period, or
- two periods, or
- three periods, or
- four periods

I saw no way to have unlimited repeating periods

My oldest clock, however, was able to be set as you mention. It also has the option to set one, two or three periods, but with this exception: if you set just the first period (for example per your suggestion of 30 moves in 60 minutes), and set all following periods to zero time zero moves, the clock will behave as you ask:

- after 30 moves 60 minutes will be added, then
- after 30 moves 60 minutes will be added, then
- etc

Again, the DGT 2500 and other new clock will merely, if set this way, act in this manner:

- game is over when first player runs out of time. Period

I find it interesting that such a simple concept to program was not implemented in these newer clocks, and only in my older clock.

My older clock which has this “feature” is an Excalibur GameTime. I took a photo to post, but I cannot figure out how to add it to this response.

One caveat: as best I can tell, on this older Excalibur clock, when you set it in this “infinite repeating” mode, you could possibly be interrupted in your 17 hour game if the batteries run out.

Here’s a question for you: how do you respond in these forums in such a way that your post will retain all the spacing, line separations, paragraphs, etc, that one so carefully lays out during composition

My older clock which has this “feature” is an Excalibur GameTime. I took a photo to post, but I cannot figure out how to add it to this response.

One caveat: as best I can tell, on this older Excalibur clock, when you set it in this “infinite repeating” mode, you could possibly be interrupted in your 17 hour game if the batteries run out.

Here’s something interesting: when I typed my initial response directly into the forum window, all my formatting was lost: spacing, paragraphs, etc.

However, if I type in a separate word document, then copy and paste into the forum, the formatting seems to be retained

Thank you very much! The alternative, of course, is to use an old analog clock - problem solved! I've been playing a rated match against someone who got into chess long after analog clocks had disappeared and is not keen on using one in our possible future matches. It's possible that he'll change his mind once he actually sees one in action.

Thanks again for the well-researched reply. I really appreciate it!

No idea