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PCB DESIGNING AND MANUFACTURING

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  1. INTRODUCTION
    4 Topics
  2. CONDUCTOR AND CONDUCTIVE PATHS
    3 Topics
  3. ZERO PCB
  4. OVERVIEW OF ELECTRONICS
    4 Topics
  5. CLASSIFICATION OF PCB
    2 Topics
  6. EAGLE OVERVIEW
    2 Topics
  7. COMPOSITION OF PRINTED CIRCUIT BOARD
    3 Topics
  8. BRIEF ABOUT COPPER
  9. COLOR OF THE PRINTED CIRCUIT BOARD
  10. PCB MANUFACTURING
  11. PCB DESIGNING
    2 Topics
  12. PCB DESIGNING SOFTWARE
    3 Topics
  13. SCHEMATIC STUDY
    4 Topics
  14. PCB TERMINOLOGIES
    13 Topics
  15. ROUTING
    5 Topics
  16. GERBER GENERATION
    4 Topics
  17. GROUND PLANE
  18. BILL OF MATERIAL
    1 Topic
  19. MISCELLANEOUS ACTIVITY
    1 Quiz
  20. ROUTING RULES
    6 Topics
  21. ACTIVITY 1
    1 Quiz
  22. ACTIVITY 2
    1 Quiz
  23. ACTIVITY 3
    1 Quiz
  24. ACTIVITY 4
    1 Quiz
  25. SCHEMATIC DESIGN
    13 Topics
  26. LAYOUT DESIGN
    8 Topics
  27. ERC
    8 Topics
  28. DRC
    3 Topics
  29. ACTIVITY 6
    1 Quiz
  30. Activity 7
    1 Quiz
  31. ACTIVITY 8
    1 Quiz
  32. ACTIVITY 9
    1 Quiz
  33. ACTIVITY 5
    1 Quiz
  34. ASSIGNMENT 1
    2 Topics
  35. ASSIGNMENT 2
    1 Topic
  36. MISCLLANEOUS ASSIGNMENT
    1 Topic
In Progress
Lesson 37 of 36
In Progress

LIBRARY

23/09/2021

A PCB library contains one or more PCB footprints that represent the physical pad arrangement and other mechanical attributes of the component.

EAGLE CAD has libraries for each family of devices like passive components (rcl.lbr), diodes (diode.lbr), transistors (transistor.lbr), power supplies (supply.lbr) and so on.

To use a certain library in a project you should first say tot the program to use that library. This is accomplished in the schematic editor by selecting the Use option from the Library menu. A selection window appear, that allows you to chose the libraries you want to include/use in the project.

EAGLE CAD - How to add a library to the project
EAGLE CAD – How to add a library to the project
EAGLE CAD -The Use Library Window
EAGLE CAD – Use Library Window
 
Once included, the library can be accessed with the tool Add from the tool panel. Using this tool opens a window that contains all the libraries that are in use.
 
EAGLE CAD - Add window
EAGLE CAD – Add window
 
If you want to place a resistor on your schematic you should go to the rcl.lbr library and select the appropriate type for your project:
 
EAGLE CAD - Adding a resistor to the schematic
EAGLE CAD – Adding a resistor to the schematic
On the left side of the Add window I selected the rcl.lbr library which expanded. From the expanded list I selected the R-EU option which expanded as well, allowing me to see all available types of resistors.
The left column contains the resistors names and the right column contains the name of the package (footprint). The selected resistor is named R-EU_0207/7 and it’s package is a 0207/7 (THT resistor).
 
The right side of the Add window contains images of the symbol and package, as well as additional data about the selected component.
 
To use the selected device into schematic simply press the OK button (right side, bottom) and you will be allowed to place the device wherever you want on the workspace by left-clicking. You can place how many components you like, until you press the ESC button.
 
EAGLE CAD - Adding a resistor to the schematic
EAGLE CAD – Adding a resistor to the schematic
Commonly used libraries:
  • Power Supply – supply1.lbr, supply2.lbr
  • Pin Headers – con-lsta.lbr, con-lstb.lbr
  • Screw Connectors – con-ptr500.lbr
  • Resistors (european symbol) – rcl.lbr > R-EU_ (for US symbols replace EU with US)
  • Capacitors (european symbol) – rcl.lbr > C-EU
  • Polarized Capacitors (european symbol) – rcl.lbr > CPOL-EU
  • Inductors (european symbol) – rcl.lbr > L-EU
  • Diodes – diode.lbr
  • NPN Transistors – transistor-npn.lbr
  • PNP Transistors – transistor-pnp.lbr
  • Field Effect Transistor – transistor-fet.lbr
  • LED’s – led.lbr > led
  • Voltage Regulators – v-reg.lbr