Johannes Schriewer
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Quick build: 18650 charger from protection/charger board, 3D printed housing and a pair of springs. Charges from USB and has a protected output (1A max) on the other end. Planning to do a second one with a switch to switch between regulated 5V (500mA) and regulated 3.3V (700mA) output mastodon.kampftoast.de/media/G mastodon.kampftoast.de/media/n

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Kampftoastforschungslabor

Primarily my private instance, but if you like the URL create an account. This instance is targeted at makers and software developers.