How to build your own electronic substitution sign/board for soccer?

Hi, I'm just throwing this question out there.  I hope someone may find this interesting and have some ideas.

Basically I am a soccer referee and would like to get my own electronic substitution sign/board for high level matches.  Unfortunately I do not have $850 to $2100 to spend.  You can take a look at these things from and get an idea what they are and what they do.


orksecurity6 years ago
What's wrong with a whiteboard? Cheap, effective, high-contrast, reusable....
yokozuna6 years ago
I've had this idea for an analog (basketball) scoreboard with several 10 position switches. Basically, take this instructable and modify it to just turn on off with a switch instead of through a circuit where it flashes. For a substitution board, you could actually separate out each section with a cheap on/off switch, and make the board say the two sets of numbers you need and then hold it up.  I made the sign itself for a football game, and it could easily be seen across the stadium, so I think this should also work for your board.