PSN-L Email List Message

Subject: RE: A/D
From: "Kareem" temp@.............
Date: Wed, 13 Feb 2002 20:16:39 -0800

Does anyone know if Radio Shack carries an A-D board or something
similar to it? I would like to connect my drum recorder (PS2) to my PC. 

-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@...............
On Behalf Of The Lahrs
Sent: Wednesday, February 13, 2002 7:28 AM
To: psn-l@..............
Subject: Re: A/D

Hi Chris,

What I need is a 1-channel AD for use in schools.
The DATAQ DI 151-RS was ideal for school seismometer use, as
it could be used with the excellent software provided by DATAQ with the
unit or with Alan Jones'  AmaSeis software.  I would like to see
developed a very simple seismometer for classroom use that when combined
with an AD and AmaSeis would register teleseisms from around the world.
If the cost of the entire package (seismometer, amplifier, AD) can be
kept under $150, then this instrument could be proposed for use in the
Globe program.
The GLOBE Program  - Students and teachers from over 3500 schools in 51 
countries work with research scientists to learn more about our planet. 
Students make and submit environmental observations via the Internet. 
Scientists use GLOBE data in their research and provide feedback to the 
students to enrich their science education and post student data sets
on the WWW.

A lot of compromises may be required to get the price so low, but I
think it's possible.  A minimal school instrument need not be exactly
linear nor calibrated.  Need not be stable for months at a time.  Need
not be sensitive to only one component of ground motion.  Need not have
a pendulum period longer than 8 seconds - as an amplifier/filter
combination will still be able to pull out surface waves at periods of
15 to 20 seconds, as is done with the AS1 instrument.

The other purpose for the AD is to record a small geophone on
a table top.  That's why the 240 Hz sample rate is specified.  This is
used in demonstrations, such as for the Table Top Seismology


>>Specifications needed:
One channel
sample rate:  1 to 240 Hz
AD sensitivity:  12 bit, +/- 10 Volt maximum
output: connect to serial port of PC
power: from PC serial port
price: $99 maximum ($50 preferred!)

>       What do you want to do with it?
>       You did not say how many channels you required?
>       Thurlby at do the VPS10 4 ch 12 bit 10
> microSec @$135
>       Pico seem to want far too much
>       I think that they effectively charge for the 'free' software in
> their module prices.
>       We really need someone to design a Kit boards that work with the
> free software available!!
>       Regards,
>       Chris Chapman

* John C. and Jan H. Lahr
* JohnJan@........
* 1925 Foothills Road
* Golden, Colorado 80401-1718
* Phone: (303) 215-9913


Public Seismic Network Mailing List (PSN-L)


Public Seismic Network Mailing List (PSN-L)

[ Top ] [ Back ] [ Home Page ]