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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.
@user110973
I would like to buy a piezo ceramic element, but I'm not sure which one to choose. What about this one? https://cdn-reichelt.de/documents/datenblatt/B400/EKULIT-190031.pdf