investigate support for 4 x 14 display

[RobTillaart]

(issue created after email request) The library currently only supports 4 x 7 segment displays.

There exist however many 4 x 14 segment displays like

• https://nl.aliexpress.com/item/4001305468072.html
• https://www.tinytronics.nl/nl/displays/segmenten/seeed-studio-grove-0.54-inch-rood-viervoudig-alfanumeriek-display-ht16k33

Q: is it possible to support these in this library?

• a super class that support both?
• a derived class to reuse the API?
• or does it need a repo of its own?

Q: can the user define its own char map?

Constraints:

• footprint for the 4 x 7 displays should not increase, both RAM and PROGMEM.
• performance of the existing code should not degrade

These constrains indicate that the derived class (or stand alone class) is the first way to explore.

[RobTillaart]

There appears to be 4x14 displays with different pin mappings (via email). I have a Seeeduino 4x14 display that is not "pin compatible" with this 7 segment library. This Seeeduino display has its own MIT licensed library, so I have to think what the added value would be of "my own" version.

[RobTillaart]

@RobTillaart Cannot think of an added functionality / value in my own library so for now I close this issue.