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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
Starting a new post based on http://forum.espruino.com/conversations/346029/#comment15260762
Espruino revision 1.4 boards already have a low speed oscillator on board. It's only 1.3 where you might want to add one.
But if you have an earlier board there's some info on fitting a crystal here: http://www.espruino.com/Clocks#espruino-original