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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.
@MaBe
Noice is also produced by usb chargerd without a load, because the are all switched.
https://www.google.de/search?q=noise+free+usb+charger&ie=UTF-8&oe=UTF-8
so better unplug them if not used ;-)