KiCad PCB EDA Suite

KiCad is a free and open source EDA (electronic design automation) software for editing circuit schematics, PCB layouts and component libraries, with Gerber and drill output.

Features
First released in 1992, KiCad is considered mature and is used for the successful development and maintenance of complex electronic boards. It doesn't impose limitations such as board size or number of pins, etc. and can handle multiple layers. Being open source it's an ideal tool for Open-source hardware projects. KiCad is available for Linux, Windows and Apple OS X (experimental, but working).

Quick start hints
To help get quickly familiar with KiCad's user interface (UI).
 * Entering a ? pops up a list of hot keys. Using these is more efficient than relying on the mouse alone.
 * Open-source software is not as polished as proprietary. If the program behaves strangely, check for known bugs.

KiCad project manager
KiCad is the project manager window. This gives access to eight stand-alone software tools: Eeschema, Schematic Library Editor, Pcbnew, PCB Footprint Editor, GerbView, Bitmap2Component, PCB Calculator and Pl Editor.

Eeschema
Eeschema is the schematic editor and component editor window.

CvPcb
CvPcb the footprint selector helper is always run from Eeschema.

Check every component and footprint before use, to ensure that they match the features required.

Pcbnew
Pcbnew is the circuit board layout editor and footprint editor.

Other tools
Other tools in KiCad include GerbView a Gerber and drill viewer, Bitmap2Component, PCB Calculator and Pl Editor.

Libraries
When you draw a schematic using the built-in libraries eeschema creates a local backup library yourprojectname-cache.lib, rename this to match the name of your project and copy it to your project folder. Then add this folder in preferences, component libraries, (click the add button at the top of the pop up window not the one below). Select the library and move it to the top of the list. From now on ensure that every symbol you use gets added and used only from this library. Any changes to the default libraries won't affect your project and it can be shared without library conflicts.

Version control
All version control systems (VCS), such as Git can handle text and binary files but binary ones cannot be merged. KiCAD files are plain text.

Basic workflow
The basic workflow in KiCad is:
 * Create a project in the project manager window.
 * Create a schematic with eeschema.
 * Assign footprints to symbols with cvpcb, generate the netlist.
 * Create a board with pcbnew, importing the netlist.
 * Test the board using the Design Rule Check.
 * Generate production files.

Further libraries
Check component pin-outs, silk screens, etc. are correct before sending for manufacture.
 * KiCad component libraries with footprints, CC-BY-SA or GPL licenced
 * KiCad libraries
 * Kicad libraries converted from Eagle

Utilities

 * Boms-Away!, BOM/component manager for KiCad
 * Quick IC symbol builder
 * KiCad Librarian
 * KiPart, generates schematic part libraries from CSV files.
 * KiCost, script for generating part-cost spreadsheets
 * Special techniques for Kicad by Robin Whittle, Apr. 2016
 * ULP scripts to convert schematics, symbols and footprints from Eagle to KiCad

KiCad format SDIY files
Some useful examples, not a comprehensive list.
 * SMRL Vactrol Sequencer
 * KiCad Synth DIY Synthblocks

Annoyances

 * One annoyance of KiCAD solved – F4 Drag, EEVblog forum, March 2012
 * All the ways KiCad annoys me, Head-Fi.org forums, Feb. 2015
 * I want to love KiCad, Reddit, Jan. 2016