Thanks everyone for staying awake during the Spice tutorial!? I barely scratched the surface of what LTSpice can do, but I hope some of you will try it out.? It can also be used for AC analysis - i.e. frequency response, noise analysis, transfer function, etc. If anyone has any questions I will be happy to try to answer them. I have attached two circuit files- the 555 LED flasher and the .wav file output demo.? The files have extension .asc that your computer may think is an ascii text file.? After installing SwicherCAD (LTSpice) your computer should recognize them as circuit files. Try running the .wav output demo and listen to the result- its WEIRD!? Listen with headphones! It will generate a file called example_wav_out.wav that plays for 20 seconds.? You can increase that time by editing the .tran statement to however many seconds you want. Links: Spice Software: http://www.linear.com/designtools/software/switchercad.jsp http://www.linear.com/designtools/software/LTspiceGettingStartedGuide.pdf Sample Circuits (netlists): http://www.ecircuitcenter.com/Circuits.htm Limitations of Spice: http://www.ecircuitcenter.com/SpiceTopics/Limitations.htm More LTSpice stuff: http://groups.yahoo.com/group/LTspice http://home.mindspring.com/~eeweb/ltspicesubckts.pdf http://www.freeda.org/doc/SPICE/spice.pdf http://ltspice.linear.com/software/scad3.pdf Thanks again!? MR
