Observed arrival · 2026-10-05

Project Horae: a slimmer open-source e-paper watch

projecthorae.com Visit website

Editorial interest 83/100 Selection signal · not a rating of the site

A public engineering log for a miniaturized e-paper watch designed to fit a slim band rather than a square case.

Landing page captured for the 2026-10-05 issue.

For: Open-hardware wearable and electronics builders
Worth noticing: The latest 35.6 × 18.0 × 7.05 mm design is still unbuilt; its antenna results come from openEMS simulation.

Field notes

The build log links to a hardware README, openEMS antenna model and results, and build123d case source with STL/3MF outputs. Its latest revision specifies a four-layer, 33.8 × 16.2 mm board and corrects earlier assembly and battery estimates; the project says no boards have been ordered, so the cited 5–7-week runtime remains an estimate, not a demonstrated result.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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