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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 don't suppose anyone has come across an easy to source optical mouse sensor?
I was just browsing and came across the ADNS2620 (on sparkfun) but they're not selling it any more (and neither are other distributors). It seems you can get sensors from alibaba pretty easily, but I'm struggling to find a 'current' one on Octopart.
While by itself it's not that exciting, it looks like most of the Avago ones at least have a debug mode that lets you read the pixel data straight off the sensor. It's low res but high frame rate, and I imagine it could be quite a fun toy when connected to Espruino.