The 16-button pcbs ha've arived. ( no LED's on it ).
The wirering is a bit different.
Controlling the 7-segments, is not going ok at the moment.
It should display: 0123 4567...
tm1638 16 01b.jpg [ 54.8 KiB | Viewed 1342 times ]
Reading the 16-buttons and display it in the 32-bit pulse-train on my LCD goes ok:
( see the '1' at position  of the pulse train. this is the most left/upper button )
tm1638 16 02b.jpg [ 53.28 KiB | Viewed 1342 times ]
This means that the wiring ( DIO, STB and CLK ) is ok.
Reading takes Write-command followed by changing the Arduino-pin DIO direction
( temporary from write to read ) etc etc...
Proberly the "adressing"of the 7-segments differs from the 8-button-pcb.
To be continued...