Logic is a digital circuit simulator for education, written in Lazarus / Free Pascal. Place push buttons, switches, sensors, logic gates (AND, OR, NOT), counters, memories, lamps, relays, buzzers and 7-segment displays on a panel, connect them with wires and run the simulation. Power rails and a voltmeter make supply and voltage visible. Components can be shown as pictures or as IEC or ANSI schematic symbols. A built-in learning path with ten lessons and example panels guides students step by step. User interface and help are available in Dutch, English, French and German; the complete help is also available as PDF. It runs on Windows and Linux.

Features

  • Digital circuit simulator for education
  • AND, OR and NOT gates
  • Push buttons, switches, DIP switch
  • Light sensor, heat sensor, pulse generator
  • Lamps, relays, buzzers, 7-segment displays
  • Counters and memories (32 x 4 bit)
  • Power rails with adjustable voltage and voltmeter
  • Schematic symbols: pictures, IEC or ANSI
  • Learning path: 10 lessons with example panels
  • Live simulation
  • Save and load panels
  • Help in 4 languages, also as PDF
  • Dutch, English, French, German
  • Windows installer and Linux .deb package
  • Free and open source (MIT)

Project Samples

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License

MIT License

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Additional Project Details

Operating Systems

Linux, Windows

Languages

Dutch, English, French, German

Intended Audience

Education, End Users/Desktop

User Interface

GTK+, Win32 (MS Windows)

Programming Language

Free Pascal, Lazarus

Related Categories

Lazarus Simulation Software, Lazarus Electronic Design Automation (EDA) Software, Lazarus Computer Aided Instruction (CAI) Software, Free Pascal Simulation Software, Free Pascal Electronic Design Automation (EDA) Software, Free Pascal Computer Aided Instruction (CAI) Software

Registered

2026-10-09