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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
Thanks for the post! It's always hard to find out what's electrical, what's software, and what's actually a physical real-world problem :)
It's well worth pinging the IR filter off an old webcam and adding a visible light filter to it - it's fascinating what the world looks like in IR (I know a class of Coke looks like lemonade :).
Also, did you try using the internal pull-downs with
pinMode(pin, "input_pulldown")? They're around 40k, but may well be enough to do what you want.