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<DIV>Mike,</DIV>
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<DIV>I have used LTSpice/Switcher CAD III on a few occasions.</DIV>
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<DIV><A
href="http://www.linear.com/designtools/software/index.jsp#Spice">http://www.linear.com/designtools/software/index.jsp#Spice</A></DIV>
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<DIV>I just checked and they have an ideal 555 model in the library.</DIV>
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<DIV>Pretty cool package.</DIV>
<DIV>I would recommend starting with a very simple design.</DIV>
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<DIV>Package is pretty easy to learn.</DIV>
<DIV>Schematic capture is easy.</DIV>
<DIV>Took me a little time to get a handle on signal generators and
plots.</DIV>
<DIV>Got bogged a few times on various details.</DIV>
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<DIV>Ron</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV></FONT><BR><BR><BR><DIV><FONT style="color: black; font: normal 10pt ARIAL, SAN-SERIF;"><HR style="MARGIN-TOP: 10px">Delicious ideas to please the pickiest eaters. <A title="http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/2050827?NCID=aolcmp00300000002598" href="http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/2050827?NCID=aolcmp00300000002598" target="_blank">Watch the video on AOL Living.</A></FONT></DIV></BODY></HTML>