This page about v1.0 of the RCCC could be more about wrestling with ancient file formats. The circuit board was designed using TurboCAD 9.0 for Windows. Not having a working Win32 environment, at the moment, will slow things down.
The basic idea was to have a credit card sized circuit board that did something, hopefully in an interesting way. This clock uses a battery-backed RTC for time keeping functions and the Z8 handles the display and time-setting functions. The blue segment of the 10 hour's LED is used as a light sensor. Aim a flashlight at that LED to trigger the the display to show the date, and again to start the set time process.