1. Component Selection Rationale Microcontroller : Freescale MC9S12NE64CPV – 112 pins (70 I/O pins, 10 input only) – Built in Ethernet controller – ATD (for Digital Thermometer) – 64 KB flash memory – Free Sample Other Choices : Rabbit RCM3750 ? No Not enough I/O pins (Require 60 I/O pins)!

2. Component Selection Rationale Temperature Sensors –Digital Thermometer : DS18S20 »No need of external power supply »Only 1 port pin required for communication Led Panel –5x7 Dot matrix LED’s : Lite-On LTP2157AKR » Inexpensive Other Choices : M1–05057A/CXX1 ? No Not Enough Info on the Data Sheet.

3. Component Selection Rationale Wireless Router : D-Link DWL–810+ –Cheaper –Higher range (upto 100m) –Faster Other choices : Linksys WET11 ? No Expensive and low range

4. Packaging Design

5. PCB Layout