In this blend file, you can find a Digital Display composed by a main body + feets + backplate + LEDs, all elements are grouped togheter for an easily position in the scene, the seventh LEDs segment are grouped toghter and linked to previews group as child.
The LEDs are animated to reproduce the different number in order to time line, when LEDs are on emit lights.
The Display reproduce the same dimension of real component mesured in millimeter.
I hope you like it.