[comp.sys.mac.hardware] Looking for serial A/D converter

slewis@aerospace.aero.org (10/20/90)

port at about 100 samples/sec. This will enable me to run
an application we have developed on the LC.

powsner@csb1.nlm.nih.gov (Seth M Powsner) (10/22/90)

Connecticut microComputer Inc offers a line of serial and GPIB products
for A/D input and output. I used an earlier GPIB product "Buster" for
EKG digitizing (normally 200-1000samples/sec). Had a little trouble
do to conflicting interpretations of the "standard," but they customized
an eprom to get me past the problem. No trouble since.

CmC: Connecticut microComputer Inc.
P.O.Box 186
Brookfield, CT 06804
800-426-2872 or 203-354-9395

Seth M Powsner  powsner@nlm.nih.gov  powsner@yalemed.bitnet

(No affiliation with CmC. Just a customer)

mikec@allspice.lcs.mit.edu (Mike Ciholas) (10/22/90)

In article <89100@aerospace.AERO.ORG> slewis@aerospace.aero.org () writes:
>port at about 100 samples/sec. This will enable me to run
>an application we have developed on the LC.

Consider modifying a sound digitizer like the CSD or MacRecorder to do
this.  It has 8 bit resolution which may not be enough for your
application, but it does do 22254 samples per second.  It can be
easily modified to do fewer conversions (or you can ignore every nth
sample) and it can be made to accept a +/- 1 volt signal for full
amplitude down to DC.

The CSD kit is available from:

	CEDAR Technologies
	P.O. Box 224
	Dublin, NH 03444

for $45 plus $4 shipping and handling to US customers.  Write for
foreign ordering info.  A cable (not included) is $8 and a disk with
PD and shareware sound stuff (some with source code) is $5.

Disclaimer:  I am CEDAR Tech.

Mike Ciholas

mikec@lcs.mit.edu