Adding Libraries and Building a Real-World Board

This chapter explains how to find parts that are not included with EAGLE/Fusion Electronics, import their libraries, and make simple library adjustments.

• Where Can I Find Components?
• Importing a Library
• Schematic
• Board Layout

Where Can I Find Components?

When the built-in libraries do not contain a part, search the web for the part number followed by EAGLE library. For less common parts, try Component Search Engine.

The site contains many components and supports several PCB applications, not only EAGLE. Its generated symbols and footprints can, however, be visually basic.

For example, Fusion 360's built-in NE555 symbol arranges pins for readability, whereas a downloaded symbol may simply list them in pin-number order. If no better library is available, download the part and edit it in EAGLE's Library Editor.

Two other useful sources are:

1. SparkFun: a well-known electronics supplier with extensive tutorials and open-source component libraries. Search for SparkFun EAGLE libraries to find its GitHub repository.
2. diy-modules: a collection covering many inexpensive modules commonly sold online. Its original website is no longer available, but mirrors remain on GitHub.

💡TIP

The libraries used here are bundled for convenience:

• Arduino-clone.lbr
• diy-modules.lbr

Importing a Library

Create a schematic, open LIBRARY in the top toolbar, then select OPEN LIBRARY MANAGER. Alternatively, enter add on the command line and use OPEN LIBRARY MANAGER at the bottom right.

In the upper-right corner of Library Manager, choose IMPORT LIBRARY → Import from local disk. After import, make sure the library is enabled under In Use.

Schematic

The following circuit is a Nano version of an Arduino Uno shield used in Form 4. It combines push-buttons, RGB LEDs and potentiometers for Arduino lessons, along with an nRF24L01 module for two-way wireless control.

💡TIP

Grey net labels act like portals: nets with the same label are electrically connected without long wires cluttering the schematic.

For Arduino devices, use Net Breakout → Pin names to create nets and labels automatically. For other components, use Net to draw a connection, then Name and Label to name it.

　　　

The component list is shown below. The nRF24L01 uses diy-modules.lbr; the Arduino Nano uses Arduino-clone.lbr. The remaining parts are available from Fusion 360's built-in libraries.

⚠️WARNING

There is only one VCC net, connected to the Arduino RAW input. The other supply nets are Arduino +5V; the nRF24L01 must use the Arduino's 3.3V supply.

Part	Value	Device	Package	Library
D1–D5	WS2812_5050	WS2812_5050	WS2812-5X5-4PIN	SparkFun-LED
JP1–JP3	PINHD-1X3	PINHD-1X3	1X03	Connector
JP4	PINHD-1X4	PINHD-1X4	1X04	Connector
LED1	F50360	F50360	F50360	Connector
M1	WIRELESS-NRF24L01	WIRELESS-NRF24L01	WIRELESS-NRF24L01	diy-modules
R1–R3	10k	R-US_R0805W	R0805W	rcl (Version 11)
R4	470	R-US_R0805W	R0805W	rcl (Version 11)
R5–R6	270	R-US_R0805W	R0805W	rcl (Version 11)
R7–R9	US-EVUF3M	US-EVUF3M	EVUFXM	pot (Version 2)
R10	1k	R-US_R0805W	R0805W	rcl (Version 11)
S1–S3		40-XX	B3F-40XX	switch-omron (Version 3)
SG1	F/TMB	F/TMB	F/TMB	buzzer (Version 2)
SJ1		SJ2W	SJ_2	jumper (Version 2)
T1	2SC1815	2SC1815	TO92-ECB	transistor (Version 7)
U$1	NANO	NANO	NANO	Arduino-clone
X1		AK500/2	AK500/2	con-ptr500 (Version 3)

Run ERC when the schematic is complete. The warnings shown below are expected for this design and can be reviewed and approved.

Board Layout

Arrange the parts in as little space as practical. Components that are electrically related—for example, the RGB LED resistors and transistor resistors—should also be physically close together.

1. Use DRC to set the boundary and mask clearance to 3 mm.
2. Add the copper polygon to complete the layout.

Translation notice: This English page was generated automatically by AI and has not yet been reviewed by a human. It will be checked and revised page by page when time permits.