1. Wireless Biometric Sensor
V i t a l i s
Wireless Biometric Sensor
Design Constraint Analysis
ECE Spring 2013
TEAM 13
Presenter: Di Mo
Team Members:
Aakash Lamba
Di Mo
Shantanu Joshi
Yi Shen

2. Project Abstract
The aim of the project is to create a prototype of a portable wireless biometric sensor that can provide doctors/nurses with an efficient way of handling multiple patients in a hospital environment. The battery-powered device is mounted on the wrist and monitors vital health parameters such as pulse rate, SpO2 and skin temperature then transmits the information via WiFi for remote web access. In addition, a NFC chip embedded on the device will allow immediate access to a patient’s charts on any NFC compatible device. The device will also include fall detection as well as a manual and automatic alarm system.

3. Block Diagram

4. Summary of Design Constraints
Critical Design Constraints
At least 2 UART outputs for WiFi and LCD
One or more I2C and SPI connections
Operable using internal oscillator (8 MHz or more)
Low power consumption (< 20 mA active)
Has a well established design tool chain
Preferable Design Characteristics
Low pin count
Large amounts of internal flash/SRAM

5. Comparison of Candidate Microcontrollers
ATmega1284
PIC32MX250F128D
Supply Voltage V V
Active current draw (8 MHz)
12 5 V V
I2C channels 1 2
SPI
UART
Internal Oscillator
8 MHz
Pin count 44
Memory
16k RAM/ 128k flash
32k RAM/ 128k flash
IDE
Atmel Studio
MPLAB
Additional Info
Available in 40 pin PDIP
built-in USB
Cost
$7.22
$4.81