Life & fun · December 24, 2014
Chars
Unicode Symbols Keyboard for iOS
What it does
Chars is most convenient way to type special Unicode characters everywhere in iOS. It works as a third-party keyboard and a simple app for quickly writing down drafts.
Does the same job
all alternatives →
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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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