Did a little exploring and saw this particularly tedious task doesn’t seem to have been done, so I threw together some equations for individual assets to express Digital time when appropriately arranged. Hopefully someone finds it useful 
In the design I call each Element a bar, and each digit uses 8 bars rather than 7 because 2 have to be placed on top of each other for the upper left to achieve 5’s and 9’s. This set up does 12h time, because I could cut a corner and only use 2 bars for the tens digit of the hours, but it wouldn’t be too hard (though, again, tedious) to adapt to tell 24 hour time.
But yeah, you can use these equations in a group of elements opacity to have them collectively tell digital time 