KiCad tool suite overview in PCB Design - Full Explanation

Introduction

Designing electronic circuits and printed circuit boards (PCBs) can be complex and confusing without the right tools. KiCad offers a complete set of software tools that help you create, test, and prepare your electronic designs for manufacturing in one place.

Explanation

Schematic Editor

This part of KiCad lets you draw the electronic circuit diagram using symbols for components like resistors, capacitors, and chips. It helps you organize and connect parts logically before moving to the physical board design.

The Schematic Editor is where you create the blueprint of your electronic circuit.

PCB Layout Editor

After the schematic is ready, this tool helps you place the physical components on a board and draw the copper tracks that connect them. It ensures the design fits the size and shape you want and follows electrical rules.

The PCB Layout Editor turns your circuit blueprint into a physical board design.

Footprint Editor

This tool allows you to create or modify the physical shapes and pads of components that will be placed on the PCB. It ensures that the parts will fit correctly on the board and connect properly.

The Footprint Editor defines the physical form of each component on the PCB.

3D Viewer

KiCad includes a 3D viewer that shows a realistic model of your PCB with all components placed. This helps you visualize the final product and check for any mechanical issues before manufacturing.

The 3D Viewer helps you see how your PCB will look in real life.

Gerber File Generation

Once the design is complete, KiCad can create Gerber files, which are the standard format used by manufacturers to produce PCBs. These files contain all the information needed to make the physical board.

Gerber files are the final output used to manufacture your PCB.

Real World Analogy

Imagine building a custom model car. First, you draw the design on paper (schematic), then you decide where each part goes on the frame (PCB layout). You make sure each part fits perfectly (footprint), look at a 3D model to see the final car, and finally, you send the plans to a factory to build it (Gerber files).

Schematic Editor → Drawing the car design on paper

PCB Layout Editor → Placing parts on the car frame

Footprint Editor → Making sure each car part fits perfectly

3D Viewer → Looking at a 3D model of the car

Gerber File Generation → Sending plans to the factory to build the car

Diagram

Diagram

┌───────────────┐
│ Schematic     │
│ Editor        │
└──────┬────────┘
       │
       ▼
┌───────────────┐
│ PCB Layout    │
│ Editor        │
└──────┬────────┘
       │
       ▼
┌───────────────┐
│ Footprint     │
│ Editor        │
└──────┬────────┘
       │
       ▼
┌───────────────┐      ┌─────────────┐
│ 3D Viewer     │◄─────│ Gerber File │
│               │      │ Generation  │
└───────────────┘      └─────────────┘

This diagram shows the flow of KiCad tools from drawing the circuit to preparing files for manufacturing.

Key Facts

Schematic Editor → Tool to create the circuit diagram using electronic symbols.

PCB Layout Editor → Tool to arrange components and routes on the physical board.

Footprint Editor → Tool to design the physical shape and pads of components.

3D Viewer → Tool to visualize the PCB and components in three dimensions.

Gerber Files → Standard files used by manufacturers to produce PCBs.

Common Confusions

Thinking the schematic editor creates the physical board layout directly.

Thinking the schematic editor creates the physical board layout directly. The schematic editor only designs the logical circuit; the physical board layout is done separately in the PCB Layout Editor.

Believing footprints are the same as schematic symbols.

Believing footprints are the same as schematic symbols. Footprints define the physical size and shape of components on the board, while schematic symbols represent the electrical function.

Summary

KiCad is a complete software suite that helps design electronic circuits and PCBs from start to finish.

It includes tools for drawing circuits, arranging physical components, creating component shapes, visualizing in 3D, and generating manufacturing files.

Each tool focuses on a specific step to ensure your design is accurate and ready for production.

Practice

1. Which part of KiCad is used to draw the electronic circuit diagram?

easy

A. Eeschema

B. Pcbnew

C. GerbView

D. CvPcb

Solution

1. Step 1: Understand KiCad components

   KiCad has different tools for different tasks: Eeschema for schematics, Pcbnew for PCB layout, GerbView for viewing manufacturing files, and CvPcb for footprint assignment.

2. Step 2: Identify schematic drawing tool

   The schematic diagram is drawn in Eeschema, which is the schematic editor.

3. Final Answer:

   Eeschema -> Option A

4. Quick Check:

   Schematic drawing = Eeschema [OK]

Hint: Remember: Eeschema = schematic editor [OK]

Common Mistakes:

• Confusing Pcbnew with schematic editor
• Thinking GerbView is for drawing circuits
• Mixing CvPcb with schematic drawing

2. Which KiCad tool is responsible for assigning footprints to schematic components?

easy

A. CvPcb

B. GerbView

C. Pcbnew

D. Eeschema

Solution

1. Step 1: Recall KiCad tool functions

   GerbView views manufacturing files, Pcbnew is for PCB layout, Eeschema is schematic editor, CvPcb assigns footprints.

2. Step 2: Match footprint assignment task

   Assigning footprints to schematic symbols is done in CvPcb.

3. Final Answer:

   CvPcb -> Option A

4. Quick Check:

   Footprint assignment = CvPcb [OK]

Hint: Footprints go with CvPcb tool [OK]

Common Mistakes:

• Choosing Pcbnew for footprint assignment
• Confusing GerbView with footprint tool
• Mixing Eeschema with footprint assignment

3. What will happen if you open a project in KiCad and launch Pcbnew?

medium

A. You will view Gerber files for manufacturing

B. You will draw the schematic diagram

C. You will assign footprints to components

D. You will edit the printed circuit board layout

Solution

1. Step 1: Identify Pcbnew's role

   Pcbnew is the KiCad tool used for designing the physical layout of the printed circuit board (PCB).

2. Step 2: Understand other options

   Drawing schematics is done in Eeschema, footprint assignment in CvPcb, and Gerber file viewing in GerbView.

3. Final Answer:

   You will edit the printed circuit board layout -> Option D

4. Quick Check:

   Pcbnew = PCB layout editor [OK]

Hint: Pcbnew edits PCB layout, not schematics [OK]

Common Mistakes:

• Thinking Pcbnew edits schematics
• Confusing footprint assignment with Pcbnew
• Mixing Gerber viewing with Pcbnew

4. You tried to open a Gerber file in KiCad's Eeschema. What is the problem?

medium

A. Gerber files open only in Pcbnew

B. Eeschema cannot open Gerber files; use GerbView instead

C. Gerber files are schematic files and open in Eeschema

D. You must convert Gerber files to footprints first

Solution

1. Step 1: Understand file types and tools

   Gerber files are manufacturing files viewed in GerbView, not schematic files.

2. Step 2: Identify correct tool for Gerber files

   Eeschema is for schematics and cannot open Gerber files; GerbView is the correct tool.

3. Final Answer:

   Eeschema cannot open Gerber files; use GerbView instead -> Option B

4. Quick Check:

   Gerber files open in GerbView [OK]

Hint: Gerber files need GerbView, not Eeschema [OK]

Common Mistakes:

• Trying to open Gerber in Pcbnew
• Thinking Gerber files are schematic files
• Believing conversion to footprints is needed

5. You want to prepare your PCB design for manufacturing using KiCad. Which sequence of tools should you use?

hard

A. GerbView -> Pcbnew -> CvPcb -> Eeschema

B. Pcbnew -> Eeschema -> CvPcb -> GerbView

C. Eeschema -> CvPcb -> Pcbnew -> GerbView

D. CvPcb -> GerbView -> Eeschema -> Pcbnew

Solution

1. Step 1: Understand the design flow in KiCad

   First, draw the schematic in Eeschema, then assign footprints in CvPcb, next design the PCB layout in Pcbnew, and finally check manufacturing files in GerbView.

2. Step 2: Match the correct sequence

   Eeschema -> CvPcb -> Pcbnew -> GerbView follows the correct order: schematic -> footprint -> PCB layout -> manufacturing files.

3. Final Answer:

   Eeschema -> CvPcb -> Pcbnew -> GerbView -> Option C

4. Quick Check:

   Design flow = Eeschema, CvPcb, Pcbnew, GerbView [OK]

Hint: Follow design flow: schematic, footprint, layout, then manufacturing [OK]

Common Mistakes:

• Starting with Pcbnew before schematic
• Viewing Gerber files before PCB layout
• Assigning footprints after PCB layout