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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 think this is something that could be useful in robotics-type projects. 500Hz update is definitely possible with Espruino, assuming the I2C interface isn't too crazy. In fact, even if the Espruino wasn't used for actual calculations, it could act as a good interface to something more powerful, which might lack an I2C connection.
There are also some interesting (tiny + cheap) range sensors from ST that use time of flight: http://www.st.com/web/catalog/mmc/FM132/SC626/PF260441
They don't use a laser beam though, so have a field of view of around 40 degrees and only 10cm range. I wonder whether the right lens over one of them might bring the FOV down and distance up, at least to the point where it'd be better for hobby robotics.