If you are an electronics engineering student, you may probably know about the importance of Logic Gates in digital circuits. Logic Gates are one of the building blocks of digital circuits. They perform all the logical operations in a circuit. There are 7 types of Logic Gates, namely, AND, OR, NOT, NAND, NOR, XOR, and XNOR. In this article, we will list some best free Online Logic Gate Simulator Tools that you can use to hone your skills.
Best Free Online Logic Gate Simulator Tools
We will describe the features of three free online Logic Gate Simulator Tools here. Let’s start.
Logic Gate Simulator
Logic Gate Simulator comes with a very simple interface that makes it a user-friendly tool for beginners. When you will open its homepage, you will find that all the Logic Gates and other input(s) and output(s) are located at the bottom of the interface. Apart from the logic gates, it also contains some other circuit components, like SR Latch, D-type Flip Flop, JK-type Flip Flop, Push Button, Switch, LED output, etc.
How to use Logic Gate Simulator
You have to draw your circuit in the graphical space provided on the website. To insert a logic gate or another circuit component, simply select it and then click anywhere on the graphical space. After inserting the components, you can use the Move tool to move the components on the space. If you want to delete a component, first, select the Delete tool from the toolbar below the graphical space and then click on the elements on the space to delete them.
When you are done, click on the Play button to start the simulation.
The Logic Gate Simulator tool also comes with some pre-designed circuit models, including:
- Flip Flop (two NOR gates)
- Ripple Counter (JK Flip Flops)
- Shift Register
- 4-bit Addition circuit
All these circuits are available in the Presets drop-down menu. You can save your project in the JSON file format or export it in an SVG format.
CircuitVerse is another free online logic gate simulator tool. You can use this tool without creating an account on their website but if you want to save your project online, you have to create an account. While saving a project, you can make it Public, Private, and limited access. In addition, you can also write a description of your project. If you keep your saved project Public, it will be visible in the search and other users will rate it.
In CircuitVerse, you can work on multiple projects in different tabs. To open a new tab, click on the Plus icon.
How to use CircuitVerse
CircuitVerse is easy to use. All the digital components are available on the left side of the interface. These include I/Os, Logic Gates, Decoders and Multiplexers, Sequential Circuit Elements, etc. To place a Logic Gate on the workspace, expand the Gates section and select the Logic Gate of your choice. You can zoom into and out of the workspace by using your mouse scroll wheel or the slider. You can change the properties of any element, like Bandwidth, Delay, etc., by selecting it on the workspace.
CircuitVerse always remains in simulator mode. This means that there is no button to start the simulation. When you finish designing the circuit, simply click on the inputs to change their state and CircuitVerse will show you the output.
It also has a Save Offline feature using which the website saves your project in your web browser’s local storage. In my opinion, saving offline is not the right option because you will lose your saved project once you clear cookie and cache data on your browser. Therefore, it is better to create your account on the website so that you could save your project on the CircuitVerse server.
You can also download your project as an image in different formats, including PNG, JPEG, SVG, BMP, GIF, etc.
Logic.ly is one more free online Logic Gate Simulator on this list. It comes with a user-friendly interface that makes it easy to understand for beginners. The digital circuit components are available on the left pane. Some of the digital circuit components that Logic.ly contains include a toggle switch, push-button, light bulb, all logic gates, flip flops, etc.
How to use Logic.ly
To create a circuit diagram, simply select the component from the left pane and place it on the working space by the drag and drop method. When you place a component on the space, the tool will show you its properties. You can change the number of inputs to a logic gate in its properties. The maximum allowed inputs for a logic gate in this tool are eight.
To draw wires, simply place your mouse cursor on the input or output nodes of the components. After that, drag your mouse by pressing its left-click.
By default, the circuit is in simulation mode. This means that after creating a circuit, you simply have to click on the inputs to change their state. You can stop, resume, and reset the simulation by clicking on the Simulate menu.
You can generate the truth table for any circuit by clicking on the respective button on the toolbar. Alternatively, you can go to “Edit > Truth Table.” By default, it shows you the Truth Table of all the circuits together. But if you want to view the Truth Table for a particular circuit, first, you have to select that entire circuit and then click on the Truth Table button. You can also export the Truth Table as CSV.
Though the Save, Print, and Export options are available only in the paid version, you can use this tool to practice the digital circuit problems.