Hi, folks. I can=B4t recommend enough LTSPICE, it is just one of the bests free to= ols (and also a very strong competitor with commercial ones) I have ever used. Also you can get a great amount of help from the Yahoo Group at: There is Helmut and a lot of other great guys, including Mike the creator of the software for Linear Technology , that always appear to help. Regards, *Carlos Marcano* -Guri, Venezuela- On 23/07/06, Sean Schouten wrote: > > A good FREE spice simulator is LTSPICE (aka SWCAD-3) from Linear > Technologies. It doesn't have a vast database of parts although it's not > hard to add or modify existing parts. All you need is a text editor and > component knowledge or it's spice directives. > > http://www.linear.com/company/software.jsp > > Have Fun! > > Sean. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist