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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.
@luxio
Maybe it would be easier, to use a custom coil instead of QI.
Would these coils (https://www.adafruit.com/product/1459) work? Which type of rechargeable battery should I use with the Puck.js?