Issie (Interactive Schematic Simulator with Integrated Editor) is an application for digital circuit design and simulation.
It is targeted at students and hobbyists that want to get a grasp of Digital Electronics concepts in a simple and fun way. Issie is designed to be beginner-friendly and guide the users toward their goals via clear error messages and visual clues.
Issie is developed and actively used in teaching at Imperial College London.
ISSIE has as a design principle that it should be easy to use by a novice, with all errors well highlighted. Error messages telling the user what the error is and how precisely to correct it, so a novice user can make the correction. Keeping to this principle has been challenging but worthwhile. We also wanted a complete system capable of real design work: good user interface is separate from large-scale features and performance and there is no reason they cannot both be implemented.
This is free and open source software.
Website: github.com/tomcl/issie
Support:
Developer: Tom Clarke
License: GNU General Public License v3.0

Issie is written in F#. Learn F# with our recommended free books and free tutorials.
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