About Digital Gate Circuit Simulator
DigicalSim (formerly: iLogicDesigner) is a full featured app which assists students in logic design, digital engineering, computer science and mathematics. The app based on basic digital building blocks, logic gates. No...
DigicalSim (formerly: iLogicDesigner) is a full featured app which assists students in logic design, digital engineering, computer science and mathematics. The app based on basic digital building blocks, logic gates. No knowledge of logic gates or digital circuits is required. It offers the basic building blocks, wiring tools and a flexible plane to create live real-time digital circuits, ideal for anyone who wants to learn the basic principles of how computers work - especially students of digital engineering, learn how to create simple logic gates, latches, flip-flops, adders, shift registers and counters. it can help them perform complete lab experiments. ► Features: - AND, NAND, OR, NOR, XOR, XNOR, Buffer, NOT, J-K Flip-Flop, D Flip-Flop, T Flip-Flop, Switch, Clock, Vcc, GND, VLink-Out, VLink-In, LED, 7-Segment Hex Display, 8-LED Stack Bar, Buzzer, and Label. - Flood gates (3 & 4) inputs for the gates (AND, NAND, OR, NOR, XOR, XNOR). - Optional Tri-State pin for the gates (Buffer, NOT), with Pull-up & Pull-down. - Optional Clock pin for J-K Flip-Flop. - Optional Clear pin for D and T Flip-Flops. - Multi-Color smooth curved wires. - Ability to add Virtual Links for tidy circuits. - Unlimited scrollable plane space, for extra large projects. - Run mode for clean circuit look, while operating live. - Circuit Lock, for safe Run. - Two switch operation modes (Toggle or Pulse). - Switchable synchronized digital waveform clock generators. with adjustable frequency. - Switches can be linked to work exclusively together. - Both Positive edge & Negative edge triggering supported for flip-flops, with indicator. - Configurable LED light color. - Live value indicators at each leg, for easy analysis. - Customizable tag for elements. - Customizable labels can be added anywhere. - Design-Time snap grid for easier alignment and cleaner look. - Zoom in & out, Also can be automatically zoomed to Show Circuit extents. - Persistent Circuit, it saves current circuit automatically to be completed later. - Save and load circuits using file manager. - A library of ready made circuit examples for quick jump start. - Circuits Can be shared and printed. - Re-assignable circuit diagram origin. - Append another circuit to the current circuit. - Highlight the gate wirings while dragged. - Select, deselect, duplicate, move & delete gates in groups. - Groups of elements can have distinctive Color and Label with customizable font and font color. - Auto scroll the plane when reach the edged while wiring, dragging or selecting. - Elastic selection rectangle to easily select elements. - Undo functionality, with 10 steps backward. - Direct wiring to use with Apple Pen. - Support to Pick'n Drop. - Boolean function viewer for each Gates & LED, while in run mode. - Live Timeline Viewer.
Version History - Added Tri-State Buffer with pull-up & pull-down. - Added Tri-State NOT Gate with pull-up & pull-down. - Added Buzzer with independent serial. - Added independent serial for LEDs. - Added Hex Digit Display (it was BCD). - Added optional Clock input for the J-K Flip-Flop. - Added optional Clear input for both the D and T Flip-Flops. - Added more Example libraries. - More Organized menus. - Some UI Tweaks. - Updated App Icon. - Updated App Info. - iOS 13 Compatibility. - Some fixed bugs. 4.5 11/28/2019 - iOS 12.x Compatibility. - iPhone X, Xs, Xs Plus, Xs Max, XR; Top notch compatibility. - Minor UI Corrections. 4.4 01/10/2019 - Adjusting Some UI elements. - Adjusting labels of some circuit components to be more adjacent to each others when in run mode. - Correct some font sizes when printing. - Other minor tweaks. 4.3 07/23/2018 - Hotfix Timeline when recursive wiring is used. - Hotfix App Lockup when acquiring The Boolean Function Box if recursive wiring is used. 4.2 05/31/2018 - Fixing bug in which Links not appended with circuits that appended. - Fixing bug in which Groups and Links not duplicated with gates. - Fixing bug in which Serialization not worked properly for duplicated gates. - Fixing bug in which Deletion of switches not deleting Links associated with it. 4.1 05/30/2018 - Aligned with Desktop Version. - Timeline Now has Play/Pause/Step forward. - Ability to choose which elements to monitor in Timeline. - Boolean function now supports Flip-Flops. - Fix Error that occurs when getting boolean function for a gate with circular reference. 4.0 05/28/2018 - Added Boolean function viewer for each Gates & LED, while in run mode. - Added Live Timeline Viewer. - Some UI Tweaks. - Some fixes. 3.7 05/21/2018 - Direct wiring to use with Apple Pen. - Added support to Pick'n Drop. - Several fixes. - Alignment with desktop version. 3.6 05/06/2018 - Added elastic selection rectangle to easily select elements. - Circuit panning now becomes with two fingers instead of one. and can be zoomed simultaneously while panning. - Customizable group label font size. - Added tag for all elements. - Added Undo functionality, with 10 steps backward. - UI re-arrangements to be more comfortable for users. - Enhancements in several areas. 3.5 04/16/2018 - Added Grouping functionalities. with configurable distinctive colors and labels. - Added Virtual Links, to enable circuits to be tidier. - Switches and Clocks Can now be linked in any number to form "Exclusive On" functionality. - "Show All" functionality Added to let users see all circuit extents. - Added Configurable Color 8-LED Bar. 3.4 04/08/2018 - ScreenShot replaced by Share inside the file properties page. - Circuits now can be shared and printed. - Narrower toolbars for more space in plane. - Enhancements in several areas. - Some bugs fixed. 3.3 04/02/2018 - Some fixes and adjustments. 3.2 03/29/2018 - Capture circuit image to photos. - Re-assignable the circuit diagram origin. - Append another circuit to the current circuit. - Highlight the gate wirings when dragged. - Select, deselect, duplicate, move & delete gates in groups. - Auto scroll the plane when reach to the edged while wiring or dragging. - Zoom in/out now pivoted in the plane center. - App store info update. - Several UI Tweaks. 3.1 03/28/2018 - Compatibility with iPhone X Notch. - Added 7-Segment LED Display. - Added flood gates (3 & 4) inputs to the gates (AND, NAND, OR, NOR, XOR, XNOR). - Clock Cycle time indicated on the clock. - Flip-Flop Trigger Edge indicated on the FF. - Minor Fixes. 2.8 03/22/2018 - Full compatibility with iOS 11 changes. - Ability to add custom tag for selected elements. - Ability to add text block anywhere in the plane. - Ability to save and load circuits using file manager. - Ability to pinch for Zoom in & out. - Added more configurable colors for LED elements. - A library of ready made circuit examples for quick jump start. - Enhanced rendering of the design. - Positive edge triggering for Flip-Flops is fixed. - Some responsive issues is fixed. - Some UI tweaks UI. 2.6 03/12/2018 - Two flip-flop trigger modes (Positive Edge or Negative Edge), defaulted to Negative Edge so Shift registers can be simulated correctly. - Some minor tweaks. 2.5 06/14/2017 - Two flip-flop trigger modes (Positive Edge or Negative Edge), defaulted to Negative Edge so Shift registers can be simulated correctly. - Some minor tweaks. 2.4 06/12/2017 - Hot fix a minor issue. 2.3 05/15/2017 - Periodic update 2.2 05/12/2017 - Added: j-k Flip-Flop, D Flip-Flop, and T Flip-Flop. - Minor bug fixed. 2.0 01/06/2017 - Hot Fix Propagation problem that occur after iOS 10.1 update. - Some requested tweaks. 1.9 11/02/2016 - Better drag experience. - Added Vcc & GND Elements. - File Structure Upgrade. - Some Tweaks. 1.8 10/12/2016 - Hot fix for several bugs surfaced after last update. 1.7 10/06/2016 - ios 10 Compatibility. - Circular reference bug fixed. 1.6 10/03/2016 - Update App Store Artworks, according to the new Specs. 1.5 08/16/2016
Previous Versions
Here you can find the changelog of Digital Gate Circuit Simulator since it was posted on our website on 2016-10-01 11:27:38.
The latest version is 4.5 and it was updated on 2026-06-22 13:16:52. See below the changes in each version.
Digital Gate Circuit Simulator version 4.5
Updated At: 2026-05-28
Changes: Version History - Added Tri-State Buffer with pull-up & pull-down.
- Added Tri-State NOT Gate with pull-up & pull-down.
- Added Buzzer with independent serial.
- Added independent serial for LEDs.
- Added Hex Digit Display (it was BCD).
- Added optional Clock input for the J-K Flip-Flop.
- Added optional Clear input for both the D and T Flip-Flops.
- Added more Example libraries.
- More Organized menus.
- Some UI Tweaks.
- Updated App Icon.
- Updated App Info.
- iOS 13 Compatibility.
- Some fixed bugs. 4.5 11/28/2019 - iOS 12.x Compatibility.
- iPhone X, Xs, Xs Plus, Xs Max, XR; Top notch compatibility.
- Minor UI Corrections. 4.4 01/10/2019 - Adjusting Some UI elements.
- Adjusting labels of some circuit components to be more adjacent to each others when in run mode.
- Correct some font sizes when printing.
- Other minor tweaks. 4.3 07/23/2018 - Hotfix Timeline when recursive wiring is used.
- Hotfix App Lockup when acquiring The Boolean Function Box if recursive wiring is used. 4.2 05/31/2018 - Fixing bug in which Links not appended with circuits that appended.
- Fixing bug in which Groups and Links not duplicated with gates.
- Fixing bug in which Serialization not worked properly for duplicated gates.
- Fixing bug in which Deletion of switches not deleting Links associated with it. 4.1 05/30/2018 - Aligned with Desktop Version.
- Timeline Now has Play/Pause/Step forward.
- Ability to choose which elements to monitor in Timeline.
- Boolean function now supports Flip-Flops.
- Fix Error that occurs when getting boolean function for a gate with circular reference. 4.0 05/28/2018 - Added Boolean function viewer for each Gates & LED, while in run mode.
- Added Live Timeline Viewer.
- Some UI Tweaks.
- Some fixes. 3.7 05/21/2018 - Direct wiring to use with Apple Pen.
- Added support to Pick'n Drop.
- Several fixes.
- Alignment with desktop version. 3.6 05/06/2018 - Added elastic selection rectangle to easily select elements.
- Circuit panning now becomes with two fingers instead of one. and can be zoomed simultaneously while panning.
- Customizable group label font size.
- Added tag for all elements.
- Added Undo functionality, with 10 steps backward.
- UI re-arrangements to be more comfortable for users.
- Enhancements in several areas. 3.5 04/16/2018 - Added Grouping functionalities. with configurable distinctive colors and labels.
- Added Virtual Links, to enable circuits to be tidier.
- Switches and Clocks Can now be linked in any number to form "Exclusive On" functionality.
- "Show All" functionality Added to let users see all circuit extents.
- Added Configurable Color 8-LED Bar. 3.4 04/08/2018 - ScreenShot replaced by Share inside the file properties page.
- Circuits now can be shared and printed.
- Narrower toolbars for more space in plane.
- Enhancements in several areas.
- Some bugs fixed. 3.3 04/02/2018 - Some fixes and adjustments. 3.2 03/29/2018 - Capture circuit image to photos.
- Re-assignable the circuit diagram origin.
- Append another circuit to the current circuit.
- Highlight the gate wirings when dragged.
- Select, deselect, duplicate, move & delete gates in groups.
- Auto scroll the plane when reach to the edged while wiring or dragging.
- Zoom in/out now pivoted in the plane center.
- App store info update.
- Several UI Tweaks. 3.1 03/28/2018 - Compatibility with iPhone X Notch.
- Added 7-Segment LED Display.
- Added flood gates (3 & 4) inputs to the gates (AND, NAND, OR, NOR, XOR, XNOR).
- Clock Cycle time indicated on the clock.
- Flip-Flop Trigger Edge indicated on the FF.
- Minor Fixes. 2.8 03/22/2018 - Full compatibility with iOS 11 changes.
- Ability to add custom tag for selected elements.
- Ability to add text block anywhere in the plane.
- Ability to save and load circuits using file manager.
- Ability to pinch for Zoom in & out.
- Added more configurable colors for LED elements.
- A library of ready made circuit examples for quick jump start.
- Enhanced rendering of the design.
- Positive edge triggering for Flip-Flops is fixed.
- Some responsive issues is fixed.
- Some UI tweaks UI. 2.6 03/12/2018 - Two flip-flop trigger modes (Positive Edge or Negative Edge), defaulted to Negative Edge so Shift registers can be simulated correctly.
- Some minor tweaks. 2.5 06/14/2017 - Two flip-flop trigger modes (Positive Edge or Negative Edge), defaulted to Negative Edge so Shift registers can be simulated correctly.
- Some minor tweaks. 2.4 06/12/2017 - Hot fix a minor issue. 2.3 05/15/2017 - Periodic update 2.2 05/12/2017 - Added: j-k Flip-Flop, D Flip-Flop, and T Flip-Flop.
- Minor bug fixed. 2.0 01/06/2017 - Hot Fix Propagation problem that occur after iOS 10.1 update.
- Some requested tweaks. 1.9 11/02/2016 - Better drag experience.
- Added Vcc & GND Elements.
- File Structure Upgrade.
- Some Tweaks. 1.8 10/12/2016 - Hot fix for several bugs surfaced after last update. 1.7 10/06/2016 - ios 10 Compatibility.
- Circular reference bug fixed. 1.6 10/03/2016 - Update App Store Artworks, according to the new Specs. 1.5 08/16/2016
Digital Gate Circuit Simulator version 4.5
Updated At: 2019-11-28
Changes: - Added Tri-State Buffer with pull-up & pull-down.
- Added Tri-State NOT Gate with pull-up & pull-down.
- Added Buzzer with independent serial.
- Added independent serial for LEDs.
- Added Hex Digit Display (it was BCD).
- Added optional Clock input for the J-K Flip-Flop.
- Added optional Clear input for both the D and T Flip-Flops.
- Added more Example libraries.
- More Organized menus.
- Some UI Tweaks.
- Updated App Icon.
- Updated App Info.
- iOS 13 Compatibility.
- Some fixed bugs.
Digital Gate Circuit Simulator version 4.5
Updated At: 2019-11-28
Changes: Nov 28, 2019
Version 4.5
- Added Tri-State Buffer with pull-up & pull-down.
- Added Tri-State NOT Gate with pull-up & pull-down.
- Added Buzzer with independent serial.
- Added independent serial for LEDs.
- Added Hex Digit Display (it was BCD).
- Added optional Clock input for the J-K Flip-Flop.
- Added optional Clear input for both the D and T Flip-Flops.
- Added more Example libraries.
- More Organized menus.
- Some UI Tweaks.
- Updated App Icon.
- Updated App Info.
- iOS 13 Compatibility.
- Some fixed bugs.
Digital Gate Circuit Simulator version 1.5
Updated At: 2016-07-06
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