At 12:20 PM 11/24/2004, Johan Baarman wrote: >Michael Rigby-Jones wrote: > >>><> >>>We often use Switchercad to verify operation of smaller circuits/sub >>>circuits. For the price it's really an excellent package. The only PIT= A is >>>adding spice models to the library which requires a bit of manual edit= ing of >>>files, but not too difficult. >Could you perhaps give me a short description on how you add spice model= s=20 >to the library? I've been trying to import different kinds of models for= a=20 >while without success and I haven't been able to find any help in the he= lp=20 >file. I also find the SwCAD 3 a great spice software if it wasn't for th= e=20 >library limited to mostly Linear devices. However considering it=B4s pri= ce=20 >which is free, I find it very valuable. Its reasonably easy to do. But the best advice I can give you is to head= =20 over to the "LT Spice" forum on Yahoo Groups and check out their=20 archives. You will also find files for hundreds of additional devices. The group owner (Helmut) spends an incredible amount of time keeping the=20 messages and files organized and all off-topic or spam messages are=20 ruthlessly purged. Its a very good resource - on par with our own PICLis= t. It took me a while to find out about the YahooGroups LT Spice support for= um=20 - I had previously tried searching on the current software package name=20 (SwitcherCAD III) and nothing showed up. It was an off-hand remark from=20 SwitcherCAD's author (Mike Engelhardt) that put me on the right track. For what its worth, I use a pair of off-line readers for searching=20 YahooGroups archives: PG Offline for messages and GroupFetch for=20 files. Both are needed: PG Offline works extremely well for reading or=20 searching messages but doesn't deal with the files in any way; GroupFetch= =20 handles the files nicely but is a pig when saving the messages. The=20 difference is that PG Offline saves message text in a standard Access=20 database (small and quick); GroupFetch saves each message as a separate=20 *LARGE* HTML page (huge and slow). The LT Spice database generated by PG= =20 Offline zips up to about 4 MB for those who might want a copy. Also for what its worth, I've spent a couple of hundred hours or so over=20 the past 6 months doing some fairly involved simulation with Switcher CAD= =20 III - the results match what I see when I build up the circuits. The ban= g=20 for the buck is just incredible. dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 20 years of Engineering Innovation (1984 - 2004) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist