
Ecobee Switch+
A $99 motion-detecting light switch you can talk to
What it does
The first light switch with the Alexa Voice Service built-in, allowing you to control other smart home devices, hear the news and weather, or use thousands of Alexa Skills from wherever the switch is installed.
Does the same job
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Almond 3 Smart Home Wi-Fi System2016 · ▲82Mesh WiFi router with smarthome hub and Alexa voice control.
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
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