Hello PSN;

I just uploaded to my site the final version of
the program which will be used to build my
next antialize filter.

I don't use version numbers I use date of Compilation
to follow my programs.

I do not sell anything.

It is only for a hobby I do these things.

PSN is only a fraction of my time/life on the internet.

But it is one of the more fun things I do.

Input Fo in Hertz and a single C value in Farads and it will
produce a text file with recommended
component values for N=2,4,6,8 LPF Butter-worth
I think the filter type to be Sallen-Key.

The formulas can be found in the ARRL
Handbook 2004 in section 16.

The idea was tested in the LTSWCAD IV software

I use a OP177GPZ op amp for this test.

I am currently using a similar design
the past few years without problems.
But it is 10Hz and not the 2Hz i intend to try.

This is not for use with Larry's Amp Boards
it is intended for a straight through
preamp with no other conditioning.
I think you don't need this if using Larry's
amplifiers.

But, it will output to his 16bit Type III A/D converter nicely.
Just make sure your supply voltages are suitable.

About +/- 5.6V to 5.7V if on the 5V A/D setting
may be  like +/- 10.7 if using the 10V setting.

This is for people who enjoy building their own stuff
like the old heathkit times.

The area I concentrate on is the cheapest link in the chain
Which is the Preamp/Filter between the Geophone and the A/D Timer
board. The other stuff requires too much money to build
or at least thats the way i see it.
It would be nice to build the Whole thing
But Who Provides such a kit ??
Only peoples with the right shop/tools can deal with these.
A sensor with 10V/in/sec would certainly be nice.

I have included the source code the Compiled x32 EXE code
and graphic examples of what i will be trying to build.

You can find the package for download at my home site
bottom of the page.

         http://www(dot)amaseistagva(dot)com/index.html
         http://amaseistagva(dot)com/index.html

To Download:
1. Navagate to bottom of page
2. Right Click the PAS file (for pasworded)
3. select (left click) [save target as... ] option
4. select your download area on your machine
After Download
1. rename the RAR SFX file from .pas to .exe
2. run file
3. enter password: asisfreeware
4. rename extraction folder
5. run exe file within new folder

The renaming has been done to try and avoid filtering of executable 
stuff around the internet.

I expect you to have no troubles if running x32 or x64 windows.

Let me know if you have any troubles running it.
I may not be able to do anything about it
it would just be nice to know.

Now back to BF3, I like flying those helicopters.
even tho I don't live very long.

Regards,
geoff







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