How to Use KiCad for PCB Design: Step-by-Step Guide

To use KiCad for PCB design, start by creating a schematic in the Eeschema editor, then generate a netlist and move to the Pcbnew layout editor to place components and route tracks. Finally, export Gerber files for manufacturing your PCB.

Syntax

KiCad uses a set of tools working together for PCB design:

• Eeschema: Create and edit electronic schematics.
• Netlist: A file generated from the schematic that lists all connections.
• Pcbnew: Layout editor to place components and route copper tracks.
• Gerber Export: Generate manufacturing files for PCB fabrication.

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1. Open KiCad and create a new project.
2. Launch Eeschema to draw your circuit schematic.
3. Annotate components and run Electrical Rules Check (ERC).
4. Generate the netlist file.
5. Open Pcbnew and import the netlist.
6. Place components on the PCB canvas.
7. Route tracks to connect pins.
8. Run Design Rules Check (DRC).
9. Export Gerber files for manufacturing.

Example

This example shows how to create a simple LED circuit schematic and layout it on a PCB using KiCad.

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1. Create a new project named "LED_Blink".
2. Open Eeschema and add a resistor, LED, and power source symbols.
3. Connect the resistor to the LED and then to the power source using wires.
4. Annotate components and run ERC to check for errors.
5. Generate the netlist file.
6. Open Pcbnew, import the netlist.
7. Place the resistor and LED footprints on the PCB.
8. Route the tracks connecting the components.
9. Run DRC to ensure no errors.
10. Export Gerber files for fabrication.

Output

A PCB layout file with placed resistor and LED footprints connected by copper tracks, ready for manufacturing.

Common Pitfalls

Many beginners make these mistakes when using KiCad:

• Not annotating components before generating the netlist, causing errors.
• Forgetting to run Electrical Rules Check (ERC) or Design Rules Check (DRC), leading to schematic or layout errors.
• Placing footprints incorrectly or not assigning footprints to schematic symbols.
• Routing tracks without considering clearance rules, causing short circuits.
• Not exporting Gerber files correctly, missing layers or drill files.

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Wrong way:
- Generate netlist without annotation.
- Skip ERC and DRC checks.
- Export incomplete Gerber files.

Right way:
- Always annotate components first.
- Run ERC in Eeschema and fix errors.
- Assign footprints before importing netlist.
- Run DRC in Pcbnew and fix layout issues.
- Export all necessary Gerber and drill files for manufacturing.

Quick Reference

Step	Tool	Purpose
1	Eeschema	Draw schematic and annotate components
2	Eeschema	Run Electrical Rules Check (ERC)
3	Eeschema	Generate netlist file
4	Pcbnew	Import netlist and place footprints
5	Pcbnew	Route copper tracks
6	Pcbnew	Run Design Rules Check (DRC)
7	Pcbnew	Export Gerber files for manufacturing

Key Takeaways

Start PCB design in KiCad by creating a schematic in Eeschema.

Always annotate components and run ERC before generating the netlist.

Use Pcbnew to place footprints and route tracks carefully following design rules.

Run DRC to catch layout errors before exporting Gerber files.

Export complete Gerber and drill files to ensure successful PCB manufacturing.