You can use 9 TPIC6B595 driver latches, mounted on perf/vero board, with a resistor somewhere in each led segment, and just 3 wires to the arduino, ( 4 wires if you want to dim the brightness )
I can post a schematic if you like
You can use 9 TPIC6B595 driver latches, mounted on perf/vero board, with a resistor somewhere in each led segment, and just 3 wires to the arduino, ( 4 wires if you want to dim the brightness )
I can post a schematic if you like