Many years ago (>25), I used Microcap circuit drawing/simulation package extensively (on a '486 PC, with an early version of Windows) ...our engineering center paid several thousand $$ to get it. Microcap folks were always very helpful & supportive & a class act. They have, of course, improved it along the way, but I was no longer at the same company, so lost track of it. But they continued on over the years.

Cash Price | Credit Card Price | |

Micro-Cap 12 | $4495 | $4720 |

Micro-Cap 12 LAN Version ( Per Seat / Two Seat Minimum ) | $4495 | $4720 |

Apparently they went belly up (probably due to competitors like Linear Tech's free simulation offerings). So it was harder to sell for thousands of $$

Anyhow, they did something really **COOL**, they now say they it's free for anyone who wants it:

*Effective 7/4/2019, Spectrum Software is closed. Micro-Cap is now free. *

*These new versions do not require the security key, so they make Micro-Cap free to the entire engineering community.
Thank you for the honor and privilege of serving you for the last 39 years.
Spectrum Software *

http://www.spectrum-soft.com/download/mc12_brochure.pdf

http://www.spectrum-soft.com/download/download.shtm

Get it while the website is still around! ...of course there will be no updates & you have to consider whether it is worthwhile to invest your time learning a software that is defunct....but hey, who can resist?

Extensive Features•64-bit version for large circuits• Multi-page hierarchical schematic editor• PSpiceTM, SPICE3, and many HSPICETMcommands and models supported• Threading support for multiple CPUs and faster simulations• Native digital simulation engine• Periodic Steady State analysis• Integral circuit optimizer with multiple optimization methods• Worst Case analysis with RSS, Monte Carlo, and Extreme Value Analysis• Smoke / Stress analysis• Harmonic and intermodulation distortion analysis• Stability analysis for linear systems• Integrated active and passive filter design function• Parts library with over 33,000 parts• Analog and digital behavioral modeling• Schematic waveform probing• On-schematic voltage/state, current, power, and condition display• Dynamic analysis updates waveforms and curves as you edit• During the run plotting• Smith charts / polar plots• Multidimensional parameter stepping• Monte Carlo analysis• Integrated spreadsheet that recognizes simulation values• 3D plotting• .Measure and Performance Function plots• Optimizing parts modeler• Gummel-Poon, Mextram and Modella bipolar models• Berkeley BSIM 1, BSIM 2, BSIM3, and BSIM4 MOSFET models• EKV V2.6 MOSFET model• Hefner IGBT model• IBIS model translator• Animated LEDs, switches, bars, meters, relays, stoplights, and DC motors• Jiles-Atherton nonlinear magnetics model• PCB interface to popular packages• LAN version for collaborative projects