A board to drive a 24X8 LED Matrix from an Arduino

Resistors from The SN74HC595's are 150 Ohms and drive the rows, with the far right output being row 1 and the far left driving the 24th row. The headers from the CD4017 on the right of the board are the following from top to bottom:

Pin 11 on the arduino

pin 10

pin 13

Vcc+ 5V

Pin 8

Pin 9



The transistors are NPN 2n3904's

The top 3 IC's are SN74HC595's and the other IC is a CD4017 decade counter

The 8 resistors from the transistors are 1k Ohm