I experiment with cm108 several months a go. i began design my own pcb(schematic and layout) using my old eaglecad.
i used to messing around with microsoldering long time a go, so it’s not too difficult to put some jumpers/wiring to
soldering it. board is a motherboard to cm108 board itself. there’s several components added such as resistor, diode
optocopler and db9 connector.
here, i shared the link project on pcbway.
pcbway cm108
and here, some picture of them.
