DCircuit Lab3.1

DCircuit Lab is a tool to simulate combinatorial and sequential digital circuits.

Circuits can be simulated in two ways:

1) one single step: all the outputs values are evaluated at the same time

2) step by step: outputs and gates are evaluated one step a time

If circuit contains clock inputs, its simulation is dynamic. This means that outputs change accordingly to the clocks. During this dynamic simulation, user can change inputs values to study the circuit behavior which is also provided via a timing chart.

Circuits are built using basic components, gates and flip-flops:

* inputs (three state: 1, 0, X - undefined)
* outputs
* wires
* NOT, AND, NAND, OR, NOR, XOR gates with any number of inputs
* Flip-flop RS, JK, T, D (Positive or Negative Edge Triggered and with Set and Reset Inputs)
* Multiplexers with any number of inputs
* Demultiplexers with any number of outputs
* Fully configurable Clocks
* Custom Components defined by their truth table
* BCD to 7 Segments Display Decoder
* 7 Segments Display

Some video tutorials are available directly from the application to learn how to use it.

Version History - Completely redesigned
- Components with any number of inputs and/or outputs
- Custom Components
- Built In Flip-Flops can now be Positive or Negative Edge Triggered and have Set and Reset Inputs
- BCD to 7 Segments Display Decoder
- 7 Segments Display
- New Video Tutorials 3.1 11/07/2023 Support for Dark Mode
Performance improvements 2.1 02/21/2023 Compatible with iOS 13
New graph feature to see the signals over time
Bug Fixing 2.0 10/25/2019 New interface
Updated to iOS10 1.7 09/20/2016 - Minor bugs fixed
- iOS 7 optimization
- Ready for next iOS version 1.6 09/09/2014 ￭ iOS7 compatibility issues fixed
￭ Minor bugs fixed 1.5 09/14/2013 ▶ Copy and Paste of components (see new video tutorial)
▶ Components can now be repositioned (see new video tutorial)
▶ Components selection improved
▶ Fixed some bugs which caused to app crash
▶ Support for iPhone5 1.4 11/30/2012 ▶ New components:

▶ Flip-Flop R-S, J-K, D, T
▶ Clock
▶ Multiplexer (4 ingressi) and Demultiplexer (4 uscite)

▶ New examples circuit
▶ Wires may be drawn in more segments at the same time (select more than two points and the tap wire)
▶ Components may also be edited double tapping on them
▶ Memory optimization 1.3 02/18/2012 ★ Improved application stability 1.2.1 10/07/2010 * Step by step simulation improved that now clearly shows gates already evaluated and those to be evaluated at the next step
* Circuit's names editable
* Step by Step tutorial aligned to the new feature 1.2 09/25/2010 * Circuit scrolling improved
* Double finger double tap to reset position and zoom level to the original values
* Wires color based on value carried on them. Red if 1, Black if 0.
* Step by step simulation. Gates to evaluate at next step highlighted in green 1.1 08/11/2010 1.0 07/23/2010