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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 actually do have a PenMan (well my parents do somewhere)... Now that would be good with a laser :)
It looks like all the smarts for the Plotmate (or at least the version I have) were in the BBC micro it was connected to, and I haven't actually seen one that was all connected up and working properly - I just got these from a friend whose school was chucking them out. Still, looking at the manual it did have some automatic pen changer, although it looks like it was an optional extra as well :)