Sustainable and repairable e-bike battery (that's also fireproof)

Does the same job

TL
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Life & fun · 9d ago · louisabraham.github.io
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Photosynthesis fires two of your iPhone
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The Interactive 3D Encyclopedia
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Eigendrum - Draw any shape and hear what it sounds like as a drum▲243
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:…
Life & fun · 26d ago · baselashraf81.github.io

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Audience insights from 1B+ online discussions in 2 mins
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One inbox for all your work discussions
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