2. 802.11 Interface PriceInterfaceDimensions Digi Connect Wi-ME$275.00“Serial”.75” x.75 x 1.95” Lantronix WiPort$150.00“Serial”1.335” x 1.280” x 0.415” DPAC Airborne WLNB-SE-DP101$108.00RS-2321.60” x 1.17” x.46” PRISM 2.5-based CompactFlash$40.00CompactFlash, 8-bit mode1.433” x 1.685” x.130” Other devices difficult or impossible to source PRISM 2.5 chipset well documented Type-I CompactFlash is the smallest solution

3. Microcontroller PriceFlashEEPROMSRAMI/O PinsMax Freq.VCC Atmel ATmega2561 [2]$17.09256 KB4 KB8 KB5416 MHz1.8-5.5 V Atmel ATmega1281 [3]$15.99128 KB4 KB8 KB5416 MHz1.8-5.5 V Atmel ATmega2560 [4]$17.97256 KB4 KB8 KB8616 MHz1.8-5.5 V Need 31 I/O pins to interface with CompactFlash card, LCD, and user buttons Unsure on Flash requirements (code size, required libraries)

4. Graphical LCD Screen ezLCD provides greatest color depth ezLCD comes packaged with LCD controller and voltage step-up circuitry ezLCD has two-wire serial interface via MAX232 or similar Price Number of Dots Colors Viewing Area Dot Size Back Light Controller Hantronix HDM3224CL-S [5] $122.64240 x 32083.9"234 μ m x 68 μ mLEDExcluded CrystalFontz CFAG320240C-YMI- VZ LCD [6] $132.90320 x 24015.96"340 μ m x 340 μ mLEDIncluded EarthLCD ezLCD-001 [1] $149.00240x1605122.7"80 μ m x 240 μ mLEDIncluded

5. Rechargeable Battery Li-Polymer battery fits necessary size/weight requirements of the design Li-Polymer battery provides a longer lifetime than the T-Mobile PDA battery PriceVoltageCurrent LifetimeSizeWeight 2S-325085 Li-Polymer Battery [8] $19.957.4 V1500 mAh3.25" x 2" x.125"2 oz. 35H10008-80 PDA T-Mobile Battery [9] $19.485.0 V1000 mAh HP 359113-001Li-Ion Battery [10]$25.003.6 V3600 mAh4.33" x 2.80" x.53"3.899 oz.

6. Packaging (0 mm deep)

7. Packaging (9.3 mm deep)

8. Packaging/PCB (19.5 mm deep)

9. Packaging (23 mm deep)

10. Packaging (27 mm deep)

11. Packaging (30 mm deep) You’ve passed the Soviet Challenge