Bubble LED displays

[Garth Wilson]

(01-13-2022 08:19 PM)Maximilian Hohmann Wrote:  If you search for "HPDL-1414" you will find lots of suppliers who will happily sell you as many end-to-end stackable 4-digit LED bubble displays as you like :-) "Smart alphanumeric" even! Not as cheap as they used to be, but still starting from under 3$/Euros a piece on Aliexpress.

Wow, those things are wide! Broadcom / Avago has serial-input dot-matrix alphanumeric ones that are really small and are end-to-end stackable, but the price is astronomical. They don't have a character generator, so you tell them what dots you want lit, any combination afforded by the matrix.