This is a schematic of a secods display that I built for a clock. The rest of the clock consisted of a NTE2061 clock IC. I wanted a seperate seconds display. But since this is seconds the same circuit would work for minutes also. Since the NTE2061 is a PMOS the MPSA13 transistors were used as interface between it and TTL. The current limit resistors for the displays will have to be adjusted as my displays are 4 inch tall and use a 12V supply as the common anode.