v1.2.3

• Fixed SVG generation for Windows OS.
• Improved export into *_sklib.py files of parts with units.

v1.2.2

• Added SVG schematic generation feature for KiCad 6, 7, and 8.
• Added backend tool identifiers of KICAD5, KICAD6, KICAD7, and KICAD8.
• For compatibility, KICAD tool identifier points to KICAD5.

v1.2.1

• is_url function fixed to solve problems with search and loading libraries.

v1.2.0

• Added ability to generate an editable schematic from a Circuit object. (Currently only works for KiCad V5.)
• Added Group object for creating hierarchy without using function calls.
• generate_pcb now takes an optional list of footprint library directories.
• If not explicitly declared, Part objects will load the default footprint from their symbol definition.
• Added empty_footprint_handler() for parts without footprints that logs errors by default but can be overriden by the user.
• Symbol libraries can now be searched on remote repositories by placing the URL in the lib_search_paths dictionary.
  KiCad V6 symbols are found at https://gitlab.com/kicad/libraries/kicad-symbols/-/raw/master
  and V5 symbols are at https://raw.githubusercontent.com/KiCad/kicad-symbols/master/.
• Part pins can now be sorted and retrieved in order using the ordered_pins property.

v1.1.0

• Added generate_pcb() function to create a PCB file directly from
  a Circuit object. (Currently only works for KiCad.)
• Added PartTmplt shortcut which creates a Part template using dest=TEMPLATE implicitly.

v1.0.0

• Buses can now be created without names and a name will be
  automatically assigned. Or use "name=..." to manually assign a name.
  Or just place a string in the list of arguments and that will be used.
• Footprint search can now process directories of footprints without the
  need for an fp-lib-table file.
• Part fields can now be accessed using attributes.
• Creating fields requires use of Part.fields[key] instead of Part.key.
• Added context manager for Circuit object so Parts/Nets can be joined
  using a with... statement.
• Adding/removing Parts to/from a Circuit can now be done using += and -=.
• Tags can be added to Parts and Circuits for hierarchical naming.
• Part values can now be assigned arbitrary objects including units from either PySpice or Pint.
• Multi-function pin names can now be split into a collection of shorter aliases,
  thus reducing the need to access pins using regexes.
• Schematics can now be automatically using the KiCad symbol graphics for the parts.
• The library interface now handles the Skywater 130 SPICE libraries.

v0.0.30

• Added @Package decorator to make subcircuits act like Parts.
• Interfaces now act like dictionaries so the ** operator works as expected.
• Interface I/O can now be accessed using brackets ([]) and via attributes (e.g., intfc.a).
• Interface I/O can now be assigned aliases.
• Added tee() function for creating T-junctions in networks.
• Custom ERCs can now be added using the erc_assert function.
• Aliases take precedence over default pin names.
• Substring matching in pin names can be enabled/disabled (off by default).

v0.0.29

• Added XSPICE parts capability to SPICE simulations.
• Unconnected XSPICE ports now are set to NULL in SPICE node lists.
• Added no_files() function to disable output to files of netlists, ERCs, logs, backup libs.

v0.0.28

• The zyc utility was split into a separate repository and placed on PyPi.
• Fixed slicing of grouped part pins so things like ram['A[1]'] won't grab A1, A10, A11, etc.

v0.0.27

• Prevent changing the name of net 0 when generating a SPICE netlist.
• Fixed Pin, Net, Bus and Part iterators so they'll work in nested loops.
• Part units are automatically added when a part is parsed.
• Files are now opened for reading using latin_1 encoding to allow special symbols used by KiCad.
• Part pins can now be aliased directly, e.g. uc[5].aliases += 'gp0'.
• Added class method get() to Part to allow finding a part based on name, reference, description.
• Refactored ERC functions to allow user-extensibility.
• Created a base object for Circuit, Part, Pin, Net, and Bus objects.
• Added an aliases property to the SKiDL base object so all its children could be aliased.
• Updated to perform simulations with ngspice version 30.
• Added a notes property to allow attachment of user notes to Parts, Pins, Nets, etc.
• Added net class to net objects for specifying net-specific design rules in PCBNEW.
• Ignore multiple pins with the same number in symbols with DeMorgan equivalents.
• Fixed problem with non-ASCII chars (e.g. Ohms) in strings.
• Sped-up part/net naming using heap/cache, binary search, sets.
• Sped-up by storing net traversals to avoid recomputation.
• Fixed processing of slices in things like sdram['A[0:15]'].
• Sped-up part_search() by eliminating unnecessary part parsing.
• Improved schematic generation with graphviz.
• Search now allows AND/OR of parenthesized terms.
• New GUI for searching for parts and footprints.
• Footprint libraries to search are now selected from the global fp-lib-table file.
• KiCad library component field values are now stored in a dict in Part indexed by the field name or F0, F1, F2...
• KiCad library component field values are also stored as Part attributes using the field name or F0, F1, F2...
• Added p and n attributes to Part object to permit explicit reference to pin numbers or names.