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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
Just FYI after having played with this, I'm not sure it can reach the 100kHz I'd guessed when doing it initially. It looks to be nearer 20kHz now - although maybe more on the F4 board.
I'd have to look into getting 12 bit. It's definitely possible though.