1. GOLD (Glucose Optical LED Detector) Group 11
BY: Samuel Bigio EE
Andrew Elkommos  EE Mitchell Munro EE
Victoria Rodriguez EE 
Victor Bassey CPE  Arjun Watane CS Justyn Chabowski-Carpino CS

2. Absorption Spectroscopy
Variables
Pulse Oximetry
Thickness of Ear
Perspiration of Skin
Temperature
Movement  
Click to add text
1550 nm 

3. Transmission Vs Reflection

4. Photodiode  And NIR LED
MarkTech hIGH sPEED ingAaS pHOTODIODE  led1550e uLTRA bRIGHT nir led through HOLE vs. smd? 

5. BLock Diagram of prototype

6. PHOTODIODE TESTING circuit
LTC1150 - Low input bias Photodetector Circuit 
LED & Photodiode rig with Glucose Solution beakers

7. Sampling Process Remove heart rate variations by sampling
RED IR and NIR, 20 times in 100ms 
20 * each LED = 120 samples 
PWM : Low, Mid And HIGH  for Spectral range
Ambient Photodiode LED Reading
Taken Prior of the light in the room
Statistical Database With (Length of ear, oximetry, Heart Beat etc.)

8. ISSUES WITH ADC Analog Devices AD7714 TI ADS1271
Released as early as 1998
Released in 2007
Three Differential Analog Inputs
One Differential Analog Input
On-chip Registers for Filters, Gains, etc.
No Registers to Program
Through Hole
Surface Mounted
Low Sample Rate(1 kSPS)
High Sample Rate (105 kSPS)

9. ADC (Analog to digital Converter)
24 Bit Resolution
High Sampling Rate
Differential Analog Inputs
High Precision
SPI Communication Interface

10. Afe4404 Integration

11. power Battery Capacity: 1000 mAh Buck Topology 12 hr. Duration
3.6V & 5V
12 hr. Duration
Adjustable output
Supply 1 
LED 
Photodiode 
3 op-amps 
MSP430 
Supply 2 
ADC

12. GOLD ANdroid application
Glucose monitoring application
Multi-user support
Glucose measurement logging
Database Encryption

13. Database
The GOLD Android application uses a local database to store the user's credentials for multi-user support and glucose information.
This database is secured using the SQLCipher SQLite extension.
There are two main tables used for the application, one to store the user, and the other to store glucose information.

14. Bluetooth
Used to communicate between the MSP430 and Android application.
This will transfer the readings that we get from our pulse oximeter.
Uses the HC-06 Bluetooth module.

15. PCB Design Manufactured by 4PCB.
Design implements LEDs and Photodiode electronics.
24 Bit ADC to be interfaced using SPI with an external Microcontroller.
Design Rule Checks and Constraints set for 5 mil minimum spacing.
Differential Pair routing to input for ADC.
Dimensions: 2.5x2.2 square in.

17. Budget Description Cost LED $17.95 Photodiode $31.43
Bluetooth Receiver
$10.00
ADC
$11.52
PCB Parts
$80.92
PCB
$40.00
AFE4404
FREE
Total
$191.82

18. Responsibilities Primary Secondary Power Victoria Mitch LED/Photodiode
Sam
Andrew
PCB Design
Algorithm CS
Victor
Bluetooth
App
Mechanical Design

19. Progress

20. Future Goals Test PCB Integrate AFE4404 with our own PCB
Mechanical Design (Ear vs. Finger)
Sensor Calibration