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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.
@Gordon
Yes, it's strange. You'd have though that the voltage regulator on the Espruino (the small black IC by the JST battery connector) would have got quite hot and maybe died - but otherwise I don't know what killed it - unless you accidentally connected it to 5V by mistake one time?