You can download the schematic diagram from here.
I made a little demo program for this clock to demonstrate how do its display and buttons work. Just write the "demo.hex" file into an empty microcontroller, then put it into the socket you soldered into the PCB. You can try the setup mode with this demo program. The clock won't step.
In "demo.asm" you can examine the multiplex technique of LED arrays and buttons.
These two files you can find in this zipped file.
Attention! Don't write the microcontroller over I sent you, because the program of binary clock is not public.