Knock Detection

[Eric Ekberg]

> In fact, I think it would be an excellent project to build a circuit that
> has 16 a/d lines connected to 16 24d/b octave bandpass filters, which in
> turn connect to the same knock sensor.  One can then use a microprocessor
> with the 16 a/d lines built in (or added, doesn't matter) to read the
> frequency spectrum of the knock sounds, and make necessary adjustments to
> timing, fuel, spark voltage, or what have you.

16 atod converters?? That would be a huge waste of resources.