Team 4 Baby Peas “ Pulse Early Alarm Sensor”

1. Team 4Baby Peas“Pulse Early Alarm Sensor” Chris Ramirez Benjamin Goolsby Xin Tong Yowwu Lin

2. What is Baby Peas ??? • Infants are weak • Traditional monitors do not tell the whole picture • Empirical data is needed • Biomarkers can give peace of mind

3. Motivation • Motivation behind Product • SIDS • Infant’s insignificant ability to maintain homeostasis • Unable to express precise problems • Motivation behind education and skill set • RF design • Software design • Medical field

4. Design Approach • SAFETY !!!! • Human Computer Interface • Usability • Functionality • Pulse • Temperature • Position

5. Specifications

6. Design Decisions • Low Power • Wireless • Ease of implementation • Vendor Support • Low Cost

7. Subsystems

8. Battery DC-DC regulator circuit Hardware Block Diagram Skin Temperature Sensor Circuit Heart Rate Sensor Circuit Body Position Sensor Circuit Atmega328P Microprocessor + HC-06 Bluetooth Device Bluetooth compatible display device

9. Central Processor • Low Power • Small and Mobile • Interface capability with multiple sensors • Interface capability with wireless devices

10. Atmega328p • Arduino development board valuable for reference design • AVR architecture • 16 Total Accessible Channels • I2C, analog interfaces

11. Peripherals • Temperature Sensor • Measures the temperature on Skin surface • TI TMP006 • Wafer Level Chip Scale • 2.4V-5.5V • Body Position Sensor • Freescale Semiconductor MMA7361L • Accelerometer • LGA package

12. Peripherals (cont.) • Pulse Sensor • Kingbright 515 nm LED • APDS-9008 ambient light photo sensor (565 nm peak sensitivity) • Left to right- • Atmega328p, TMP006 • HC-06, MMA7361L, • Bottom right is pulse • Sensor

13. Communications

14. Bluetooth

15. POWER • Texas Instruments LP2985-33DBVR • 1.5% tolerance • Constant output of 3.3V • Current output up to 150 mA • SOT-23 Package

16. Power Schematic

17. Sensor Schematics TMP006 MMA7361L

18. Pulse Sensor Schematic

19. Atmega328p MPU Schematic

20. Bluetooth Schematic

21. Printed Circuit Board • Eagle Cadsoft • www.4PCB.com

22. Board Layout

23. User Interface Design • Ease of use • Navigation • Menus • Conducive to the purpose of the device • Responsive

24. App Organization

25. Ikea Instruction

26. Concept Design

27. Build • Soldering LGA, BGA, QFN packages and crystal oscillators w/ hot air pencil under 10x microscope • Solder remaining components with solder iron.

28. Test

29. Work Division

30. Bill of Materials Item: Price (USD): Microprocessor $5.19 LED & Photosensor $1.2 Components $33 Accelerometer $12 TMP006 Free Sample HC-06 $10 PCB $66 Total … $127.39

31. Project Budget Item: Price (USD): Components $1047.31 Accelerometer Breakout Board $12 AFE4490 $Free Sample MPU6000 Breakout $10.72 TMP006 Breakout $18.77 MMA7361L Breakout $12 Pulse Sensor Breakoutx2 $75 HC-06 $120 PCBX4 $354 Hobbyist Version Eagle $170 TI Sponsorship $-200 CC2541 Debugger $180 Total … $1807.79

32. Project Schedule

33. Project Progress

34. Difficulties and Lessons Learned • Software Development Licenses (IAR embedded workbench 30 day) • C2541 8051 processor • BLE protocol stack understanding • MIT app developer integration • PCB layout learning curve • HC-06 soldering • Pulse Sensor sensitivity in ankle area

35. Thanks • Dr. Chan • John Edison • Dr. Abichar • Dr. Richie • David Johnston (L3 communications RF Engineer) • Brandon Patterson (Full Sail software Engineer) • Cadsoft Eagle staff • Texas Instruments • Arduino Save Us • Ben’s parents • Chris’ wife • Xin Tong • Yowwu Lin • Christopher Ramirez • Ben Goolsby

36. Late Night

37. Any Questions ????