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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
I'm not sure at all - I'd been thinking 2mm minor pitch with a major one every 5 (so 10cm), but to be honest that's not really ideal either as I imagine you'd want to draw a lot of stuff on a 5mm grid (where there would be no dots).
I guess you could continue the geek theme with binary... you could have a 1mm grid and several shades of dot - 1mm, 2mm, 4mm, 8mm, 16mm :)