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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
Are you sure you've connected the wires up exactly as in http://www.espruino.com/MAX7219
And that you've got the right end (the DIN end, not the DOUT end)
I've just tried again with 1v60, and it still works perfectly.