Controlling motors with Apple IIe

[atl@cray.com (Tony Laundrie {x66591 CF/DEV})]

A friend of mine will soon inherit a bunch of old Apple IIe computers to use
in his industrial arts class.  He would like to use the computers to read
sensors and control lights or mechanical devices that he has (motors,
robot arms, etc.).

- What kinds of hardware I/O ports are available on these computers?
  (Parallel printer, RS-232 serial, joystick, Analog-to-Digital, etc.)

- Is there a ftp or www site that has pinouts for the ports?

- Does somebody have software or BASIC or machine language routines to read
  and write to the I/O ports?

- Does anybody manufacture a box to connect to one of the ports and provide
  64-256 TTL-level I/O wires?  How about 120-volt wires?

Thanks for any help you can provide!

(He asked me to help because he saw how I interfaced an old Commodore 64
 running BASIC to some Christmas lights for an interesting light show.)

atl@cray.com