A pcb board can be designed to fit a variety of tiles, possibly back lit, possibly with corners similar to this project. https://www.crowdsupply.com/hexabitz/modular-electronics a stand alone pcb backer or custom one can be fabricated as well.
A pcb board can be designed to fit a variety of tiles, possibly back lit, possibly with corners similar to this project.
https://www.crowdsupply.com/hexabitz/modular-electronics
a stand alone pcb backer or custom one can be fabricated as well.