Doh. Missed the cut off by a tinsy bit to go see Submarine directed by Richard Ayoade of “The IT Crowd” fame. Totally worth it.
More on this one in the future… it’s a combo of the standard ITP version and some other circuits. To see the Physical Computing, pg 357 circuit you can go here: http://itp.nyu.edu/physcomp/sensors/Reports/CondenserMicrophones – although I’m wondering if the rectifier is truly necessary, I’m wondering how using the bypass cap would effect it the behavior… and if looking fo a threshold… why not do it in code?
LOOONG answer to “what’s a bypass capacitor” : http://www.intersil.com/data/an/an1325.pdf
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