tester

Archiver

im tring to make a scsi cable tester and not sure where to start not
enough i/o pins to do this is an i/o coprossesor what i need or will
something else make it easier. anything would be a help

Archiver

A bunch of SCSI info: http://www.scsilibrary.com/cable.html

You can use a serially interfaced MAX6952 to control 140 LEDS at a
time and I believe the highest count SCSI cable is 80 lines (SCA
type)so that would give you more than enough outputs.

You could also go the way of a few 74HC595 and/or it's brother the
74HC165 as well or IO coprocessors depending on how you want to test.

Have a look through some of the Nuts/Volts/Stampworks/Edu Material
columns on Parallax's website for expanding IO info.

It all really depends on what method you are thinking of testing
with.

You won't need a controller in a lot of instances.

Resc.




--- In basicstamps@yahoogroups.com, melvin_pederson@y... wrote:
> im tring to make a scsi cable tester and not sure where to start
not
> enough i/o pins to do this is an i/o coprossesor what i need or
will
> something else make it easier. anything would be a help