Elderly Health Monitoring Wearable
Overview A compact wearable device designed to monitor elderly patients’ vitals and provide a two-way communication channel between patients and care providers. The design prioritised a small form factor without compromising sensor coverage or communication capability. Date September 2025 My role Hardware Design + Firmware (partial) PCB 4-Layer, KiCad GitHub hardware-portfolio/ElderlyHealthTracker Features Fall Detection — IMU-based detection to alert care providers automatically Vitals Monitoring — Pulse oximetry (SpO₂) and body temperature sensors Two-Way Audio — Speaker amplifier with speaker, and dual PDM MEMS microphones processed through a DSP chip for clear remote communication SOS Button — Dedicated emergency button for immediate alert dispatch SD Card Storage — Logging vitals and audio recordings locally Hardware Highlights 4-layer PCB — Required to meet strict size constraints while routing high-speed PDM lines, analog sensor signals, and power cleanly without interference between domains. Layer stack optimised for signal integrity: signal / ground / power / signal. ...