Building a clock the hard way

[vk6ti]

Some forum members may find interest in Nixie clocks.
Some time ago I built this cool clock. Not wanting to go down the cumbersome dekatron path, and avoiding the ebay PIC multiplex kits available, I decided to build my own. Based on garden variety chips ( flipflops and decade counters ) and a load of HV switching transistors, and multiple circuit board attempts, find assembled clock.
Note the extra last digit showing 1/10ths of a second, I know it's completely useless, but it gosh it looks good to watch. Keeps relatively good time based on 50Hz mains cycle.
( original concept HH:MM from "Mikes Electric Stuff" site, well worth a visit

Ray