Next came one revision after the other…

First functional prototype with a working backlight. Still no UI at this stage

Version 1 brought to light mechanical obstacles I would need to take into account when it came to the case, then the case drove changes to the PCBs (Circuit Boards). Things stayed in pendulous compromise until Version 4. That’s when the module slot was fully standardized and set in stone. The hinges and cross board communication was now settled as well. But most importantly, the matrix was finalized and the responsibilities of each board were set in stone. The next design challenge was cutting costs and ensuring the design was as robust as possible which meant making the matrix layer reversible and designing the control board in such a way that it could control either side without needing a unique version.