# Micro-Cap > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Micro-Cap > Markdown URL: https://mediated.wiki/source/Micro-Cap.md > Source: https://en.wikipedia.org/wiki/Micro-Cap > Source revision: 1267958511 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) Analog and digital circuit simulator Micro-Cap Original authors Andy Thompson, Tim O'Brien, Bill Steele Developer Spectrum Software Release September 1982; 43 years ago (1982-09) Final release 12.2.0.5 / June 17, 2021; 5 years ago (2021-06-17) Operating system Windows 2K, XP, Vista, 7, 8, 8.1, 10 Platform IA-32, x86-64 Size 58 MB Available in English Type Electronic design automation License Freeware Website Website archive **Micro-Cap**[1] is a [SPICE](/source/SPICE) compatible analog/digital circuit simulator with an integrated schematic editor that provides an interactive sketch and simulate environment for electronics engineers. It was developed by [Spectrum Software](/source/Spectrum_Software), and was only available with a paid commercial license.[2] In July 2019, Spectrum Software closed down and Micro-Cap was released as [freeware](/source/Freeware).[3] Software updates and technical support are no longer available. In early 2023, their website went offline, though it was previously backed up at archive.org.[4] ## Version history The name Micro-Cap was derived from the term Microcomputer Circuit Analysis Program. The forerunners to the Micro-Cap simulator were the Logic Designer and Simulator. Released in June 1980, this product was the first integrated circuit editor and logic simulation system available for personal computers. Its primary goal was to provide a “circuit creation and simulation” environment for digital simulation. In August 1981, the analog equivalent of the first program, Circuit Designer and Simulator, was released. Its integrated text editor created circuit descriptions for a simple, linear, analog simulator. September 1982 saw the release of the first Micro-Cap package as a successor to the Circuit Designer and Simulator. - 1982 Micro-Cap - 1984 Micro-Cap 2 - 1988 Micro-Cap 3 - 1992 Micro-Cap 4 - 1995 Micro-Cap 5 - 1997 Micro-Cap 5 2.0 - 1999 Micro-Cap 6 - 2001 Micro-Cap 7 - 2004 Micro-Cap 8 - 2007 Micro-Cap 9 - 2010 Micro-Cap 10 - 2013 Micro-Cap 11 - 2018 Micro-Cap 12 - the final major version ## See also - [Comparison of EDA software](/source/Comparison_of_EDA_software) - [List of free electronics circuit simulators](/source/List_of_free_electronics_circuit_simulators) ## References 1. **[^](#cite_ref-1)** Thompson, Andy. ["Micro-CAP: An Analog Circuit Design System for Personal Computers"](https://web.archive.org/web/20121012013611/http://www.computer.org/portal/web/csdl/doi/10.1109/MCG.1984.276090). *IEEE Computer Society*. IEEE. Archived from [the original](http://www.computer.org/portal/web/csdl/doi/10.1109/MCG.1984.276090) on 2012-10-12. Retrieved 2011-08-04. 1. **[^](#cite_ref-2)** ["Micro-Cap Price List"](https://web.archive.org/web/20181108030621/http://www.spectrum-soft.com/price.shtm). *Micro-Cap*. Archived from [the original](http://www.spectrum-soft.com/price.shtm) on November 8, 2018. 1. **[^](#cite_ref-3)** ["Commercial Circuit Simulator Goes Free"](https://hackaday.com/2020/01/08/commercial-circuit-simulator-goes-free/). *Hack-A-Day*. January 8, 2020. [Archived](https://web.archive.org/web/20230327075118/https://hackaday.com/2020/01/08/commercial-circuit-simulator-goes-free/) from the original on March 27, 2023. 1. **[^](#cite_ref-4)** [Final archive of Spectrum Software website; February 19, 2023.](https://web.archive.org/web/20230219052113/http://www.spectrum-soft.com/index.shtm) **Notes** - [Spice Programs: Computerized Circuit Analysis For Analog EEs](http://electronicdesign.com/embedded/spice-programs-computerized-circuit-analysis-analog-ees) - [Analysis of digital filters via SPICE-family programs](http://user.unob.cz/biolek/DF/DFa.htm) - [Modeling IIj Noise in HEMTS with SPICE-Based Micro-Cap](http://home.fnal.gov/~kubik/Noise.pdf) - [AC Analysis of Idealized Switched-Capacitor Circuits in Spice-Compatible Programs](http://user.unob.cz/biolek/veda/articles/CSCC07.pdf) - [White Paper: A New Zobel Network for Audio](https://web.archive.org/web/20100928040701/http://www.russandrews.com/downloads/ZapperatorDocJA4.pdf) - [Get more power with a boosted triode](https://archive.today/20130103161801/http://www.edn.com/article/481000-Get_more_power_with_a_boosted_triode.php) ## External links - [Archive of Micro-Cap website](https://web.archive.org/web/20230219052113/http://www.spectrum-soft.com/index.shtm) at the [Wayback Machine](/source/Wayback_Machine) (archived February 19, 2023) - [Download Micro-Cap](https://web.archive.org/web/20230214034946/http://www.spectrum-soft.com/download/download.shtm), archived - [Micro-Cap Brochure](https://web.archive.org/web/20230309075525/http://www.spectrum-soft.com/download/mc12_brochure.pdf), archived - [Micro-Cap Application Notes](https://web.archive.org/web/20230106104609/http://www.spectrum-soft.com/news.shtm), archived v t e Computer-aided design (CAD) software Free and open-source Mechanical 2D (CADD) LibreCAD QCAD rattleCAD SteamCAD XTrackCAD [uk] 2D/3D (CAx/FEx) BRL-CAD FreeCAD FREE!ship [uk] gCAD3D LeoCAD OpenRocket [uk] OpenSCAD OpenVSP Salome SolveSpace XFLR5 [uk] Architectural (AEC) Sweet Home 3D Electrical Electric FreePCB Fritzing gEDA Horizon EDA KiCad kTechLab Magic ngspice Oregano pcb-rnd QUCS SPICE XCircuit Optical Astree/Foucault2 ATMOS Geopter Inkscape#Ray Optics FreeCAD#Optics Workbench Garment Inkscape#Ink/Stitch Valentina Proprietary Mechanical ABViewer Alibre Design AutoCAD Autodesk Alias Autodesk Inventor AutoTURN BrickLink Studio BricsCAD CATIA Cimatron Cobalt Creo Elements/Direct Drafting Creo Parametric DesignSpark Mechanical FastCAD (EasyCAD) FINE FORAN Fusion 360 GstarCAD IRONCAD KeyCreator (CADKEY) Lego Digital Designer MEDUSA4 MicroStation NX Onshape PDMS Pro/DESKTOP Rhinoceros 3D Grasshopper 3D rattleCAD 4.0 Shapr3D Solid Edge SolidWorks Sonata (RUCAPS) SpaceClaim T-FLEX CAD Tinkercad TurboCAD VariCAD ZWCAD Architectural (AEC) Archicad Autodesk Revit LIRA [uk] List of building information modeling software Electrical Allegro (OrCAD) Altium Designer (Protel (Autotrax (Easytrax, Tango PCB)), P-CAD) AutoCAD Electrical BoardStation, IntegraStation, PADS, Xpedition CADSTAR CircuitMaker CR-2000, CR-3000, CR-5000, CR-8000 DesignSpark PCB DipTrace EAGLE EasyEDA LTspice Micro-Cap Multisim PCB Proteus Pulsonix SolidWorks Electrical TARGET TopoR (Delta Design, FreeStyle) Ultiboard Upverter Optical Aber OSLO Zemax Garment Clo3D Embird File formats 3MF ACIS AMF C3D CKD DSN DWF DWFX DWG DXF IGES OBJ OpenDWG PLY PSpice SES STEP STL Modeling kernels ACIS C3D Digital Geometric Kernel (KernelCAD) IntelliCAD Open Cascade Technology Open Design Alliance (Teigha) Romulus (Parasolid) RGK ShapeManager SMLib Historic DAC-1 (1963) Sketchpad (1963) UNISURF (1968) Italics = discontinued Computer-aided industrial design • Comparison • History Media related to CAD at Wikimedia Commons • Engineering portal • Glossary of terms --- Adapted from the Wikipedia article [Micro-Cap](https://en.wikipedia.org/wiki/Micro-Cap) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Micro-Cap?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.