I got screwed on the WB02 purchase

[Shannen Durphey]

You pull a stunt like this and then ask for help?

Shannen

A70Duster at aol.com wrote:
> 
> Now that I have you attention.....;)
> 
> Does anybody have a schematic for making a knock detector circuit.  I'm
> guessing the circuit would have a front end band pass filter of 4k to 7k
> Hertz.  Then that signal could be used to trigger a 555 timer that could
> flash a light/LED.
> 
> It's on a SBC, 4.04" bore, 3.75" stroke.
> 
> Something simple and I don't want to reinvent the wheel.
> 
> Thanks!

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