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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user140377
Thanks, sounds like it needs more or less exactly 5V.
Right now I'm thinking CR2032 battery holder, 5V step up regulator and some 3d printing. Will see if it is just a crazy idea of mine or I will put something together.