Thanks for your info and especially code for using the 7219 LED driver.
Found a bit more info to help those like me having trouble connecting the 7219 to an LED matrix
MAX7219 --> LED Connections:
'
' MAX7219.2 (0) --> Col 1 (left)
' MAX7219.11 (1) --> Col 2
' MAX7219.6 (2) --> Col 3
' MAX7219.7 (3) --> Col 4
' MAX7219.3 (4) --> Col 5
' MAX7219.10 (5) --> Col 6
' MAX7219.5 (6) --> Col 7
' MAX7219.8 (7) --> Col 8
' MAX7219.17 (g) --> Row 1 (top)
' MAX7219.15 (f) --> Row 2
' MAX7219.21 (e) --> Row 3
' MAX7219.23 (d) --> Row 4
' MAX7219.20 (c) --> Row 5
' MAX7219.16 (b) --> Row 6
' MAX7219.14 (a) --> Row 7
' MAX7219.22 (DP) --> Row 8
' MAX7219.18 (I_set) --> 10K resistor --> +5V
' MAX7219.4 (GND) --> GND
' MAX7219.9 (GND) --> GND
' MAX7219.19 (V+) --> +5V
' MAX7219.13 (CLK) --> Arduino (pin 3 in example code)
' MAX7219.12 (LOAD) --> Arduino (pin 4 in example code) and in parallel 10K resistor to GND
' MAX7219.1 (DIN) --> Arduino (pin 2 in example code)
Please let me know if I've got something wrong! I'm not sure if pin 22 should go to the first or last row... guess I'll find out when i power it up.
thanks,
alex