All circuit boards come assembled and tested,
and feature:
      ATmega128-16 processor
     JTAG and ISP headers
     LCD header
     Keypad header
     linear regulator
     LM61 temperature sensor
     dual RS-232 driver
     piezo electric buzzer
     large prototype area
     digital potentiometer for LCD contrast control
     PWM circuit for LCD Back light

See individual schematics for details.
We've tried to include the most commonly utilized components.  Of course, we couldn't
include everything so we left a lot of prototyping area.
People have often asked why we included the temperature sensor.  Here are three uses:
1.  Monitor the internal temperature and shut down if it exceeds the operating limit.
2.  Software based temperature compensation for analog circuits, LCD contrast or the Real Time Clock.
3.  Allows software to log the max/min temperatures your product is exposed to and validate warranty claims.


PCB Info
PDK-H PCB
PDK-I PCB
PDK-H PCB
Voltage regulator
Voltage regulator
DC jack
DC jack
ATmega128
footprint
for cyrstals
keypad
connector
keypad
connector
ATmega128
LCD connector
LCD connector
RS232
driver
RS232
driver
piezo
transducer
piezo
transducer
ISP header
JTAG
header
JTAG
header
ISP header
on/off
switch
footprint for
9 Volt battery holder
footprint
for
cyrstals