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23Apple Watch· all 34▼
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How can a watch feel your pulse without touching a vein? Press the steps, or wait and the machine runs them by itself.×3
DESK MAT5 MM GRID · NON-SLIP
heart rate– bpmLED flasheshundreds/sECGsingle-leadbattery, Appleup to 18 hparts1 watchdisplay, Apple396 × 484 px
The big idea: the Apple Watch reads your pulse with light. Its green LEDs flash hundreds of times a second and its photodiodes count how much your blood soaks up with every heartbeat; the electrodes in the crown and on the back record a single-lead ECG (Apple's wording; the battery's up to 18 hours and the 396 × 484 screen are Apple's figures for the 45 mm case, and 72 bpm is a typical resting pulse used as the example).
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Made by @elvar_official · drawn in code with Claude Code on the iso kit from wheresryan22/anatomy (MIT)