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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.
@oesterle
@Robin, @OwenBrotherwood: Yeah, maybe a 3.3v buck converter like this:
https://www.adafruit.com/products/1066
…plus a USB 5v 1A battery pack.
I've made this to replace the CR2032 on Puck.js with AA batteries:
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