Seismic Microphone as C/V source

[Paul Perry]

At 08:42 AM 9/08/00 EDT, Peter B. Echophazer wrote:

>I would like to build a circuit that would allow me to output an increasing 
>control voltage as the magnitude of a seismic event increases. 

I imagine a peak detector would do.
If you are looking at a reasonably long time, like more than a minute, you could
use one of those 'infinite' sample&hold ckts (based on an A to D) and keep 
comparing the currently held voltage to the peak detector, updating the s&h
if the
peak got higher.

If you like programming, this is a project that cries for a PIC micro.

paul perry melbourne australia

BTW, was this one of the geosensors at AllElectronics?
I couldn't work out why these turn up so often, even in California, but then
i thought.. oil prospecting!