Kevin Rye decided to build a 15 inch long digital clock after acquiring these 3 inch 7-segment displays.  He documented the project from start to finish:

• LUMEX 3″ 7-Segment Displays
• 3″ LCD Clock – Part I
• 3″ LCD Clock – Part II
• 3″ LCD Clock – Part III
• 3″ LCD Clock – Part IV
• 3″ LCD Clock – Part V

I picked up these sweet LUMEX S101D22TR 7-Segment LCDs the other day.

The PCBs for the hours, minutes, and seconds display modules are identical. They’ll just be wired differently.

On the driver boards, data flows in from the left out to the next section on the right.

The source files can be downloaded from:

15inch-LCD-Clock-Source.zip