Wrist Health Tracker

by TylerK

A wrist-worn nRF52840 health tracker for sleep-quality scoring: heart rate, HRV, SpO2, steps and skin temperature, logged to flash and synced over BLE to a home server. Four-layer 32 x 30 mm KiCad board with single-sided assembly, a 3D-printed 35.7 x 33.9 x 9.95 mm case and a magnetic pogo-pin dock.