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Logisim – A Graphical Tool for Designing and Simulating Digital Logic Circuits

peter_d_sherman 4y ago
Related: Logisim links: http://www.cburch.com/logisim/links.html http://www.cburch.com/logisim/links.html 7400 series Logisim library from Ben Oztalay (ZIP, uncompressed): http://www.cburch.com/logisim/download/7400-lib.zip http://www.cburch.com/logisim/download/7400-lib.zip 7400 series Logisim library from Technological Services Company (ZIP, uncompressed): http://www.cburch.com/logisim/download/7400-series-rev1.zip http://www.cburch.com/logisim/download/7400-series-rev1.zip I Designed My Own 16-bit CPU: https://www.youtube.com/watch?v=Zt0JfmV7CyI https://www.youtube.com/watch?v=Zt0JfmV7CyI
Svetlitski 4y ago
Ah Logisim, brings back fond memories of creating a RISC-V CPU for CS61C at UC Berkeley.
- skot9000 4y ago
  That’s cool they switched CS61C to RISC-V.. we did a MIPS CPU (although maybe they are similar now?)
timojaask 4y ago
Looks like development was suspended back in 2014. There seems to be a recently maintained fork: https://github.com/logisim-evolution/logisim-evolution https://github.com/logisim-evolution/logisim-evolution
- kevhito 4y ago
  I have another fork that is still (mostly) maintained and used as well: https://github.com/kevinawalsh/logisim-evolution https://github.com/kevinawalsh/logisim-evolution The REDS-HEIG version you link to has more development activity, support for a wider variety of FPGAs, and a few other advanced features. My version has some neat features not found in REDS-HEIG fork, and usually aims to keep the interface more beginner-friendly and streamlined for use as student's first-contact with digital circuits.
spicybright 4y ago
Oh wow, I never thought I would see this again! I learned logic gates using this, and even made a video game out of a grid of LEDs. You were a car that had to dodge oncoming traffic by switching between columns. EDIT: After trying it, it's not the one I remember. I used the very similar program LogicSim http://www.tetzl.de/java_logic_simulator.html#download http://www.tetzl.de/java_logic_simulator.html#download Runs perfect still. Just make sure you have java version 1.4 and up ;)
anta40 4y ago
Very cool tool. Almost 2 decades ago, I learnt Principles of Digital Design in the university using EWB (Electronics Workbench), then known as Multisim. It's Windows only. Then a friend pointed me to Logisim, which also runs well on Linux. Unfortunately, the development was suspended, which lead to various forks like: - https://github.com/lbulej/fork-logisim-evolution https://github.com/lbulej/fork-logisim-evolution - https://github.com/Logisim-Ita/Logisim https://github.com/Logisim-Ita/Logisim - https://github.com/logisim-evolution/logisim-evolution https://github.com/logisim-evolution/logisim-evolution
- Dracophoenix 4y ago
  How does LogiSim compare to KiCad or LTSpice?
  - SAI_Peregrinus 4y ago
    LogiSim is for simulating digital logic only. LTSpice is for simulating analog circuits, particularly power electronics. KiCAD is a schematic design and layout tool, it's for designing printed circuit boards. So it's a bit of an apples:lettuce:walnuts comparison. They're all for different categories of thing, though all deal with some sort of circuit in some sense.
    - Dracophoenix 4y ago
      Since you seem knowledgable on the subject, do you know of any open source or cheap integrated circuit simulators and/or design tools?
      - hulitu 4y ago
        LTSpice for windows. Spice3f5/ngspice for unix
        Dracophoenix 4y ago
        LTSpice/NgSpice can accurately simulate digital logic in custom-made integrated circuits? Can one achieve close-to-professional results?
fanbouey 4y ago
I love logisim. I used it on a course called "Digital Systems" in undergrad. It was one of my first CS courses - I had a project to create a digital calendar (it displayed time of day, day, month and year) and had so much fun learning to use it. Got to play with all sorts of quartz crystals, latches, flip-flops, etc. In the end, it was so exciting getting it all working - I even implemented leap years (for february et al). Such a great tool to learn about circuit design!
denysvitali 4y ago
EveryCircuit is also an alternative that focuses on circuits in general, not only digital ones
alpark3 4y ago
Berkeley uses Logisim for its computer architectures class. One of the projects was to create a basic cpu within Logisim. Really the first time that I saw how we go from code to hardware.
friendlyHornet 4y ago
I took an intro course at uni in digital circuit design, which was part of the core CS courses. We used logism for the pre-labs, and then implemented the circuits on bread-boards It ended up being one of my favourite courses of all my undergrad courses
frye668 4y ago
We are still using it! Laboratory course of Computer Architecture I (B.Sc. Computer Science). Still the best tool around to learn your first steps in digital design.
occamschainsaw 4y ago
We used a fork of Logisim for the computer architecture courses (CS 2110/2200?)at Georgia Tech as well. It was called Brandonsim[1] after the hyper productive Head TA Brandon who adapted it for our courses. [1] https://github.com/TricksterGuy/Brandonsim https://github.com/TricksterGuy/Brandonsim

Related: Logisim links: http://www.cburch.com/logisim/links.html http://www.cburch.com/logisim/links.html 7400 series Logisim library from Ben Oztalay (ZIP, uncompressed): http://www.cburch.com/logisim/download/7400-lib.zip http://www.cburch.com/logisim/download/7400-lib.zip 7400 series Logisim library from Technological Services Company (ZIP, uncompressed): http://www.cburch.com/logisim/download/7400-series-rev1.zip http://www.cburch.com/logisim/download/7400-series-rev1.zip I Designed My Own 16-bit CPU: https://www.youtube.com/watch?v=Zt0JfmV7CyI https://www.youtube.com/watch?v=Zt0JfmV7CyI

Svetlitski 4y ago

Ah Logisim, brings back fond memories of creating a RISC-V CPU for CS61C at UC Berkeley.

skot9000 4y ago
That’s cool they switched CS61C to RISC-V.. we did a MIPS CPU (although maybe they are similar now?)

timojaask 4y ago

Looks like development was suspended back in 2014. There seems to be a recently maintained fork: https://github.com/logisim-evolution/logisim-evolution https://github.com/logisim-evolution/logisim-evolution

kevhito 4y ago
I have another fork that is still (mostly) maintained and used as well: https://github.com/kevinawalsh/logisim-evolution https://github.com/kevinawalsh/logisim-evolution The REDS-HEIG version you link to has more development activity, support for a wider variety of FPGAs, and a few other advanced features. My version has some neat features not found in REDS-HEIG fork, and usually aims to keep the interface more beginner-friendly and streamlined for use as student's first-contact with digital circuits.

spicybright 4y ago

Oh wow, I never thought I would see this again! I learned logic gates using this, and even made a video game out of a grid of LEDs. You were a car that had to dodge oncoming traffic by switching between columns. EDIT: After trying it, it's not the one I remember. I used the very similar program LogicSim http://www.tetzl.de/java_logic_simulator.html#download http://www.tetzl.de/java_logic_simulator.html#download Runs perfect still. Just make sure you have java version 1.4 and up ;)

anta40 4y ago

Very cool tool. Almost 2 decades ago, I learnt Principles of Digital Design in the university using EWB (Electronics Workbench), then known as Multisim. It's Windows only. Then a friend pointed me to Logisim, which also runs well on Linux. Unfortunately, the development was suspended, which lead to various forks like: - https://github.com/lbulej/fork-logisim-evolution https://github.com/lbulej/fork-logisim-evolution - https://github.com/Logisim-Ita/Logisim https://github.com/Logisim-Ita/Logisim - https://github.com/logisim-evolution/logisim-evolution https://github.com/logisim-evolution/logisim-evolution

Dracophoenix 4y ago
How does LogiSim compare to KiCad or LTSpice?
- SAI_Peregrinus 4y ago
  LogiSim is for simulating digital logic only. LTSpice is for simulating analog circuits, particularly power electronics. KiCAD is a schematic design and layout tool, it's for designing printed circuit boards. So it's a bit of an apples:lettuce:walnuts comparison. They're all for different categories of thing, though all deal with some sort of circuit in some sense.
  - Dracophoenix 4y ago
    Since you seem knowledgable on the subject, do you know of any open source or cheap integrated circuit simulators and/or design tools?
    - hulitu 4y ago
      LTSpice for windows. Spice3f5/ngspice for unix
      - Dracophoenix 4y ago
        LTSpice/NgSpice can accurately simulate digital logic in custom-made integrated circuits? Can one achieve close-to-professional results?

fanbouey 4y ago

I love logisim. I used it on a course called "Digital Systems" in undergrad. It was one of my first CS courses - I had a project to create a digital calendar (it displayed time of day, day, month and year) and had so much fun learning to use it. Got to play with all sorts of quartz crystals, latches, flip-flops, etc. In the end, it was so exciting getting it all working - I even implemented leap years (for february et al). Such a great tool to learn about circuit design!

denysvitali 4y ago

EveryCircuit is also an alternative that focuses on circuits in general, not only digital ones

alpark3 4y ago

Berkeley uses Logisim for its computer architectures class. One of the projects was to create a basic cpu within Logisim. Really the first time that I saw how we go from code to hardware.

friendlyHornet 4y ago

I took an intro course at uni in digital circuit design, which was part of the core CS courses. We used logism for the pre-labs, and then implemented the circuits on bread-boards It ended up being one of my favourite courses of all my undergrad courses

frye668 4y ago

We are still using it! Laboratory course of Computer Architecture I (B.Sc. Computer Science). Still the best tool around to learn your first steps in digital design.

occamschainsaw 4y ago

We used a fork of Logisim for the computer architecture courses (CS 2110/2200?)at Georgia Tech as well. It was called Brandonsim[1] after the hyper productive Head TA Brandon who adapted it for our courses. [1] https://github.com/TricksterGuy/Brandonsim https://github.com/TricksterGuy/Brandonsim