Microcontroler: ATMEL AVR 2313 @ 10Mhz
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Features:
- RS232 Interface (from 9600 to 57600 bauds)
- 8 PWM or Servo motor outputs, 255 steps, 20 us resolution, 
  5.1 ms period in PWM mode, 20.4 ms period in Servo mode
- 5 General purpose Input / Outputs (20mA sink)
- User definable board ID number (up to 224 devices). '0' by default
- Power supply: 4.0V to 6.0V 
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Ports Used:	

PORTB 	0-7	8 PWM / Servo outputs 
PORTD     0	Uart receive
PORTD     1	Uart send
PORTD	2-6	5 GPIO

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Serial Commands: (x = device ID, hh = 8 bits hexadecimal value)

xPn hh : Set PWM #n value to 'hh' (0=always 0, 1=20us pulse... 255=always 1)
xCP hh : Set PWM/Servo mode bits (0=Servo, 1=PWM) default=00
xCD hh : Set PORTD direction bits (0=input, 1=ouput) default=00 
xI     : Get PORTD bits (returns "hh\n")
xO hh  : Set PORTD bits to 'hh'
