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Delaware, USA
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Completed Project

Smart Wearable
Health Monitor

A compact wearable device with embedded biometric sensors for continuous health monitoring, featuring heart rate, SpO2, temperature tracking, and cloud-based analytics.

Smart Wearable Health Monitor
5
Bio Sensors
72
Hrs Battery
99%
HR Accuracy
9
Weeks to Build

System Architecture

Sensor Array

PPG, accelerometer, temperature, SpO2, and galvanic skin response sensors on flexible PCB

Processing Unit

Nordic nRF52840 SoC with BLE 5.0 and on-device signal filtering and feature extraction

Cloud Sync

Encrypted BLE data transfer to mobile app with automatic cloud backup and analysis

Health Dashboard

Flutter mobile app with real-time vitals, trend graphs, and personalized health insights

Core Capabilities

Continuous Heart Rate

Photoplethysmography sensor with adaptive sampling delivers accurate BPM readings during rest and exercise.

Blood Oxygen Monitoring

Dual-wavelength SpO2 sensor with medical-grade accuracy for continuous oxygen saturation tracking.

Temperature Tracking

Skin temperature sensor with 0.1C resolution for circadian rhythm monitoring and fever detection alerts.

Activity Recognition

6-axis IMU with ML-based activity classification detecting walking, running, sleeping, and sedentary states.

Ultra-Low Power

Aggressive power management with dynamic sensor duty cycling achieving 72-hour battery life on a single charge.

Health Data Privacy

End-to-end encrypted data transmission with on-device anonymization and HIPAA-compliant cloud storage.

Wearable Device
Wearable Device - Final Prototype
Sensor PCB
Sensor PCB
Mobile App
Mobile Dashboard

Development Process

01
Sensor Selection

Evaluated PPG, IMU, and temperature sensors for accuracy, power consumption, and form factor compatibility.

02
Hardware Miniaturization

Flexible 4-layer PCB design with component placement optimized for a wrist-worn enclosure under 12mm thick.

03
Firmware & DSP

nRF52840 firmware with real-time signal conditioning, heart rate extraction, and BLE GATT service implementation.

04
Mobile App Development

Flutter cross-platform app with real-time BLE data streaming, trend visualization, and health insight engine.

05
Clinical Validation

Comparison testing against medical-grade devices for heart rate, SpO2, and temperature measurement accuracy.

Project Results

Heart Rate Accuracy99%
SpO2 Accuracy97%
Battery Life72 hrs
Data Sync Reliability99.8%
Wearability Score4.7/5
Tech Stack
nRF52840 BLE 5.0 PPG IMU Flutter Dart Python TensorFlow Lite KiCad AWS IoT MQTT 3D Printing

Interested in Wearable Technology?

From biometric sensors to mobile health apps, our team designs wearable solutions that combine medical-grade accuracy with consumer-friendly design.