That’s the old schematic you’ve linked.
If you’re going to use code from my blog, better use the new one:
blog.spitzenpfeil.org/wordpress/ … ublish.pdf
What’s important for you is the right part of the schematic.
The shift register’s serial input (SER) is wired to the arduino’s MOSI line, clock (SRCLK) is wired to the arduino’s SCK line, the latch (RCLK) is wired to the arduino’s SS line, display enable (G) is wired to a digital output of the arduino board. In my code I used pin 9.
MOSI: duemlanove: 11 / MEGA: 51
SCK: duemilanove: 13 / MEGA: 52
SS : duemilanove: 10 / MEGA: 53
enable: duemilanove: 9 / MEGA: (use any digital output line + change the #define in the code)
The code compiles on 168/328/1280 chips without modifications for register names. As I don’t have a MEGA board I can’t test though.
Don’t forget to use a 10k pullup for the (G) line, this keeps the LEDs off if you upload new code. Also wire the (SRCLR) line to +5V. That line is active-low and clears the data, which you don’t want 