Microcontroller
Atmel AVR ATMega16 @ 4MHz

Pin Assignments:
// shift register
DATA		PC0
CLOCK		PC1
STROBE	PC2
OE		PC3

// TIP-42
Rows		PA1-PA7

// RS-232
UART		PD0,PD1

Requires Procyon libraries to compile. http://hubbard.engr.scu.edu/embedded/avr/avrlib/

Serial settings
9600 8N1
Sign accepts strings composed of the ASCII characters below. A newline '\n' or carriage
return '\r' character designates the end of a string and causes it to be displayed on the sign.
If the string is longer than the 16 characters of the sign then the text will wrap around and
overwrite the beginning of the string.

Sign character set
(space)!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ
[\]^_`abcdefghijklmnopqrstuvwxyz{|}       ->  <-

Edge connector on sign
1	Vdd		+5VDC
2	Gnd
3	Output Enable	\
4	Strobe		|___ Shift Registers
5	Clock		|
6	Data		/
7	Row 7		\
8	Row 6		|
9	Row 5		|___ Power Transistors
10	Row 4		|
11	Row 3		|
12	Row 2		|
13	Row 1		/
14	Vled		+12VDC
15	Gnd