1. EE 296 Icarus Project Group Members: JimyLeah Castro Jeremy Chan Eric Lee Sae Yoon

2. Project Overview Use a Zilog Microcontroller to handle telemetry Multiplex several sensor readings via communications channel Transmit data wirelessly

3. Overview of Initial Engineering Objectives Interface with sensors Utilize a radio system Design a portable device Create a custom printed circuit board Apply theoretical concepts

4. Overall Design Block Diagram

5. Design Structure – Circuit Schematic

7. Design Structure Circuit Modules Power Supply (5V, 3.3V) Zilog 40 Pin 64KB Flash Microcontroller MAXStream9 RF Modems Microchip TC1074A Temperature Sensor Lassen IQ+ GPS MPX4115A Motorola Pressure Sensor LM324 Operational Amplifier Ultra Low Power Attenuator Circuits

8. Initial Prototype

9. Final Prototype

10. Final Design Status ModulesTestedSoftware Driving Integration Power Supply – 3.3V, 5V Zilog Z8 Encore! Flash Microcontroller MAXStream9 RF Modem - OEM Microchip TC1074A Temperature Sensor GPS MXP4100A Motorolla Pressure Sensor w/ Analog Support System

11. Design Features Bidirectional Communication – full duplex command and telemetry via wireless Power Trim Mode – hibernate the radio in order to cut power consumption by 33% Low Battery Detection and Response – automatic power trimming, warnings Attenuator Circuits – to scale voltages with high accuracy and low power consumption

12. Challenges Encountered Programming Limitations Proprietary Serial Protocol Implementation High Power Consumption Scheduling Conflicts Vibrations Affect Pressure Readings

13. Data via Telemetry

14. Icarus Diamond Head Telemetry

15. Data via Telemetry Diamond Head Hike, 12/26/2006

16. Message Formats Sensor Data –$DAT:76.1,F,24.5,C,100.421,kPa,8.29,V* GPS Data (NEMA 0183 Standard) –$GPGGA,034944.00,2116.3475,N,15748.0174, W,1,03,2.38,00089,M,004,M,,*73 System Status Messages –$STAT_BATT,7.33,V,LOW-BATT-TRIM-MODE- ACTIVATED* –$STAT_BATT,7.38,V,LOW-BATT* NEMA style messages allow for easy reading and data filtering

17. Outstanding Problems SHT11 Scrapped GPS: Unable to Acquire GPS Fix Reliably

18. Future Improvements On-board Data Logging via Flash Device Additional Sensors Implement remote control devices Higher Resolution ADC for Pressure Space Reduction Power Optimization Data Checksum Implementation

19. Final Design Demonstration

20. Thank You