LogicSimulator v1.1

This is a simple circuit simulator made in Java using the JavaFX framework.

Download

Available for Windows, Linux and MacOS and browser.

Web-version

Try the web-version now at https://orangomango.itch.io/logicsimulator.

Features

Building blocks

• Switches (input)
• Lights/RGB Lights (output)
• AND gate
• NOT gate
• Bus
• Tri-state buffer
• 7 Segment display
• Circuits embedding using chips

Simulator features

• Save/Load projects to a readable JSON format
• Save projects as a chip with your custom name and color
• Clear workspace
• Delete gate/wire
• Connect multiple buses together
• Gate label
• Connect/Disconnect pins from the circuit
• Turn global power on/off
• Export circuit to a PNG image

Keyboard usage help

• Use P to toggle global power on/off (You can also click on the green/red rectangle at the bottom)
• Use H to show/hide the toolbar
• Use DELETE to delete selected gates from the circuit
• Use Shift + DELETE to delete the wires of the selected gates in the circuit
• Use Z and X to decrement/increment buses amount when placing a bus
• Use R to align selected buses
• Use F1 to show/hide pin IDs
• Use Shift when:
  • placing a wire to align it
  • to place an input pin instead of an output one onto the bus
  • to move pins that are on a bus
• Use Control when:
  • placing a wire to delete the previous point
  • to define a new selection without unselecting the previous one
• Use Alt to place a wirepoint on the position of the nearest wirepoint on the circuit

Mouse usage help

• Use the scroll wheel to scale the canvas
• Use Left click:
  • on pins to enter wire-placing mode
  • to place the chosen block from the menu on the right
  • to toggle a switch on/off
  • to delete a gate if you clicked on the RM GATE button
  • to place a pin on a bus (use Shift to toggle between an input/output pin)
  • to resize a bus horizontally or vertically
  • to connect buses together if you clicked on the CONNECT BUS button
  • to delete a wire if you clicked on the RM WIRE button (click on 2 pins)
  • to move a pin of the bus if the Shift key is pressed too
  • to define a selection area or if you click on the background to unselect the current selection
• Use Right click:
  • to interrupt an action like creating a bus, deleting a gate or a wire
  • to move the camera
  • to move selected gates or selected wire points
  • to open the gate properties menu where you can change the label, remove a pin (if you clicked on a bus pin), and so on
  • to look inside a chip

Web version changes

• To load a file, upload it and then click the Load button
• To load chips into your project (dependencies), upload them by using the second upload button. Once uploaded, you find them in the sidebar on the right.
• Use the slider to scale the UI
• Toggle the Move button to move around the scene or to move the gates in your project (instead of the right-click)
• Some buttons in the toolbar are replacements for the keys DELETE, R, SHIFT, CONTROL and ALT

Examples

Individual project files are available in the examples directory.

• 1 bit register
• 4 bit adder
• 4 bit register
• 7 segment driver
• 1 bit adder
• 4 bit ALU
• Buffer
• Bus buffer
• Dabble
• D Flip-Flop
• Double dabble
• NAND gate
• NOR gate
• OR gate
• Set-Reset Flip-Flop
• Set-Reset latch
• XOR gate

Simulator screenshots and exports

Thanks to @SebLague who inspired me to make this :)