Just some miscellaneous video…
This first video was filmed in 2014 towards the end of that year. The PCB design software and the high speed etching machine make for a brilliant combination for professional looking manufactured products. This video and others are featured in Youtube. You can see from this footage the amount of understanding of digital combinational logic to implement the correct switching situations. Of course the whole thing could also be written with a small programmable controller or RISC processor.
Part two of the PCB design video: