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LoCAD is a software for designing and simulating digital circuits. Special emphasis is given to simple creation and graphical visualization of a circuit's functioning. The inputs and outputs of the elements can be wired quite simply. Usually, two clicks are sufficient. The system searches a convenient way by itself.

In the simulation, you can watch the current flow and thus follow the cycle of state changes. This way, your understanding of a circuit's functioning is enhanced, and your perception of circuit faults is improved. It is possible to produce your own elements (ICs) with discretionary levels of nesting.

What's New

Version 2.0:
  • A problem with drawing and deleting lines has been fixed.
  • Improvement and simplification of the interior view of an IC. A step back is now also possible with a click on the circuit.
  • Further components are available:
    • For the basic elements: tri-state gate and delay element
    • For the block elements: Binary counter and 16 x 4 bit RAM



  • macOS 10.12 or later

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LoCAD User Discussion


Current Version (2.x)


Downloads 234
Version Downloads 13
License Shareware
Date 22 Mar 2018
Platform Intel 64 / OS X
Price Free
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