4 digit charlieplexed segment display
Maybe you need ultra thin custom display, this is solution …. Why charlieplexing? because it is for my like piece of magic.
The board is a thin 0.8mm tall thanks to our 2 Layer Half-Height Double-Copper service. bobricius has shared 7seg-micro.brd on OSH Park. However, he is still working on Arduino code to control the board.
OSH Park 