alt Hacker NewsRemember those little LED keychains for your "mobile phone" that would magically light up when taking/making calls and sending/receiving texts?
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thenthenthen • last Saturday at 1:38 PM
These stopped working since 2G, since it uses radically less power. Altho I did recall seeing some fancy phone cases with blinkies on 3G… never could replicate it sadly. I guess with a lot of joule thief/stepup circuits it might work…
I don't remember that, but I do remember my speakers buzzing just before a call or text came through.