This page serves as a link to resources which might be of interest and use to ADB I/O users.

ADB I/O related products:

Gefen	Up to 1000' ADB cable extenders. A must if you want to place your ADB I/O far away from your Mac.
XTension	Two-way, Mac X-10 software for use with CM11 and other X-10 interface boxes. This system together with ADB I/O(s) can allow you to build complete process control systems.
MAX	An interactive real-time graphic programming environment for multimedia.
IGOR PRO	A real-time graphing package for science and engineering applications.

Component sources (with special thanks to Doug Holton who compiled most of this list):

General:
Analog Devices	A great source for sensors, signal conditioners and other relevant devices.
National Semiconductor	On-line application notes (in PDF format) and a lot of other information.
Omega Engineering	Lots of serious measurement stuff. If you order the full catalog you will get about one shelf-foot of quality information.
DigiKey	Lots of neat stuff and an on-line catalog. This seems to be one of the favorites for small scale experimentation and hobbyists.
Radio Shack	Not much on-line.
ADIstruments	Interesting selection of medical/chemical probes. They also carry Mac science instrumentation and software.
Edmund Scientific	Print catalog has much more electronic stuff. So far we are only aware of their optics being on line.
Maplin Electronics	PO Box 3 Rayleigh, Essex, SS6 2BR 170-255-4161 vox 170-255-3935 fax (from the USA dial 011-44-the number)
B&B Electronics - data acq.	Lots of serial interface (RS-232) modules for both data acquisition and control applications.
National Instruments	The creators of LabView.
Vernier	Software and hardware aimed at education. Both Mac and PC versions.
PASCO	A selection of sensors, most operating in the -10 to +10 volt output range.
Robot Specific:
OWI Robot Kits	Complete robot kits and accessories.
Arrick	X-Y-Z gantrys and robot links.
Robotic Systems, Inc.
Mondo-Tronics Robot Store	Hobby robot kits, components, books and video tapes.
Mekatronix Robot Product Line	A selection of robots and accessories.
Lego Data Acquisition and Prototyping System	This is a NASA site. LDAPS is a NASA developed system based upon Lego components, aimed at K-12 science/engineering education.
MIT computer-controlled robot projects	Information about the robotics work being carried out by Fred G. Martin at MIT. Much of this work is based upon Lego components.
CSI Mobile Robotics Lab	Information about mobile robotics work being carried out at the College of Staten Island.
Robohoo	A Geocities page with links to robot links.
Robot books	This is a source of robot books, kits, movies, and toys.
Stepper Motors
Control of Stepping Motors, a tutoria	An excellent tutorial on stepper motors by Douglas W. Jones University of Iowa Department of Computer Science
An interface to a stepper motor	Shows the basics behind stepper motor control. The information could be used to take the TTL outputs from an ADB I/O to control a stepper motor.
More stepper motor info	This is a page which Keelan Lightfoot found.

Mac interface related sites and information:

Mac Serial Port Interfacing

A general introduction to Mac serial port interfacing.