Programs for discrete event and continuous systems reproduction, queuing models, bond graphs, manufacturing scenarios, signal flow graphs, and animation in 3D. Includes free demo.
http://www.raczynski.com/pn/pn.htm
This is basically an amplified "crystal radio" designed to receive nearby AM aircraft transmissions.
http://www.techlib.com/electronics/aircraft.htm
Information on long distance scanner reception from Europe and how it occurs.Hear and identify American signals. Equipment and logging pages. Irish frequency pages.
http://www.geocities.com/yogi540
inexpensive and easy-to-build PC-based alternative to a dedicated protocol analyzer which taps to RS-232C line
http://www.edn.com/archives/1994/092994/20di2.htm
Switch almost everything on and off with a simple mouse click. Some tech specs: relay outputs, on-board power regulator, on-board serial port.
http://www.nutchip.com/progetti/pc_out/pc_out_en.htm
as used in lot of older PC I/O cards
http://www.psyber.com/~dibsed/CIRCATS/cmosrcs.gif
Using COP800
http://www.national.com/an/AN/AN-681.pdf
This software that lets you remotely control your computer from the serial port (RS-232). This software works with many IR receivers, including commercial and homebuilt design. This software works also with IrDA-compliant transceiver module with ASK/TV Re
http://www.pcremotecontrol.com/info.html
A simple yet accurate thermometer that adds a temperature icon to the Windows taskbar. Based on DS1621.
http://www.riccibitti.com/pc_therm.htm
PC-VFO ISA DDS signal generator plans, schematics and information.
http://www.waveguide.us/pc-vfo/index.htm