Large Scoreboard/Countdown Display (Buy or Arduino?)

[metrologist]

We are looking to count down days, something like 3-6 months, perhaps something like DDD:HH:MM or larger days on top and HH:MM below. Something that would work on a basketball court, say 20-30cm character size.

OTS would probably be OK if not too expensive.

Or if there is a large display that could work easily with Arduino, then I'd be willing to program that. My skills are so-so in that context though, but I imagine there is a library that makes a larger dot matrix display doable?

Are there such large dot-matrix displays or a commercial product that could fit the bill? Of course I searched and the ones I saw did not really seem to fit the function or if they did it was not very clear.

[james_s]

This seems like something that would be easy to build. Certainly if you can make it work on a small scale using any sort of LED display you have on hand, then you can easily scale it up to as large as you need. You can make large to huge digits easily out of arrays of lamps or LED strips or individual power LEDs with suitable diffusers.