Abacom Aug 28,2003
Abacom - makes low-cost AM wireless tramsmitters, receivers, and transceivers.
Acroname Aug 29,2003
Acroname - They carry some nice H-bridge chips, and sensors. Great articles on how to use their products as well.
Automatic Position Reporting System Sep 10,2005
APRS is a system that combines GPS with short-range packet radio to provide positioning data even in places where GPS doesn't easily reach.
Cell Phone Activity Detector Dec 24,2004
This circuit supposedly detects nearby cell phone activity and lights the LED in the circuit when it's detected. Seems simple enough, and could be very useful for those wanting to detect when a phone rings, gets or sends a message, etc. I haven't tested it, however, and it looks like it could be a bit finicky about the antenna shape and length.
Glolab Aug 28,2003
Glolab - make a few very easy-to-use low cost RF modules...
LPRS, Inc. Aug 28,2003
Low Power Radio Solutions - An English company, more RF transmitters.
Linx Technologies Aug 28,2003
Linx Technologies - RF Transmitters controllable from a microcontroller...
Rentron Aug 28,2003
Rentron - makes a number of low-cost, easy-to-use RF modules...
Robert Poor's Sending Little Packers Tutorial Sep 13,2003
Robert Poor has a brief tutorial on sending little packets that includes links to several RF module manufacturers and some C code for the PIC.
SerialIO Aug 27,2005
SerialIO sells a number of serial I/O products, including barcode scanners, serial cables for a number of different PDAs and phones, and more.
Sparkfun Feb 13,2004
Sparkfun sells some fun stuff: cheap accelerometer boards, PIC programmers, and more. They also have the cheapest GPS modules I've seen so far.
Total Robots Jan 8,2004
Total Robots has sensors, IR communication modules, RF modules, GPS modules, motor controllers, and more. Some nice servo controllers as well.