Hi Am I correct in assuming that some of you guys at least would have experience of PSPICE? I've downloaded the free 'student' version, and I have a question. I managed to suss out how to model a switch opening or closing after a period of time, but is it possible to model a 'noisy' switch change at all? Also, PSPICE to me so far seems very good for modelling individual little modules, but I'm not sure how I'd go about drawing the schematic for my whole project, ready to feed in to something to lay out a PCB - how can I put in place a dumb 16/18pin IC to represent a PIC or any other IC not in the library? or a connector strip, ICP programming header? Am I using the wrong tool for what I need? Regards, Mark ============================================================================== This message is for the sole use of the intended recipient. If you received this message in error please delete it and notify us. If this message was misdirected, CSFB does not waive any confidentiality or privilege. CSFB retains and monitors electronic communications sent through its network. Instructions transmitted over this system are not binding on CSFB until they are confirmed by us. Message transmission is not guaranteed to be secure. ============================================================================== _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist