DB9 Datalogging cable HOWTO ?
 

I was wondering if anyone has the wiring information for a simple DB9 serial datalogging cable?

Required materials:
CDROM Audio Cable from an older computer

Serial Cable or Null Modem Cable (DB9)


what i am using is a Null Modem Cable and a CDROM Audio Cable, theoretically if i find out which pins the computer needs to read for the cable i can build 2 datalogging cables from 1 null modem cable.

any help would be appreciated

pictures of what i've got so-far
http://members.shaw.ca/barcher/datalog/datalog1.jpg
http://members.shaw.ca/barcher/datalog/datalog2.jpg
http://members.shaw.ca/barcher/datalog/datalog3.jpg
http://members.shaw.ca/barcher/datalog/datalog4.jpg