Data logging efi

[Jake Sternberg]

you can look in the radio shack mail order electronics catalog
(called "TechAmerica") and pick an A/D chip out.  They have a
real nice one with an eight-input multiplexer (connect eight
signals to it and it will allow you to digitally select them)
and an 8-bit output.  If you have a two-way parallel port on your
laptop you should be able to wire this thing up to it with no
other devices.  try to power it with +5v from the computer though,
like from the keyboard socket, to be safe.

-jake