Pcb design using_eagle

A Hands-on Training on:
PRESENTED BY:
Mr. ABDUL MUNAFF
Asst. Professor
DEPARTMENT OF ELECTICAL & ELECTRONICS ENGINEERING, SIET,
VIJAYAPURA.

Is it the bird EAGLE ?????
The name EAGLE is an acronym, which stands for:
Easily Applicable Graphical Layout Editor

ORGANIZATION OF PRESENTATION
 Objective of this Workshop.
 Evolution of PCB.
 Types of PCB- Single, Double Layer, Multi-Layer.
 Components Type & their Footprint.
 EAGLE Schematic Editor, Layout Editor.
 Manual routing & Autorouter.
 Design Rule Check(DRC) & Electrical Rule Check(ERC).
 Terminologies related to Schematic, PCB Layout.
 Outcome.

Objective of this Seminar
 INSPIRING CREATIVE & INNOVATIVE MINDS
 KT (Knowledge Transfer)
 Technology Awareness
 Skill Development

Introduction to PCB
 A printed circuit board is used to mechanically support and
electrically connect electronic components using conductive pathways
(tracks).
 It is also referred to as printed wiring board (PWB).
 A PCB populated with electronic components is known as a printed
circuit board assembly (PCBA).
 Before PCB’s came into existence, point to point construction or
wire wrap were used to construct equipments.
Fig: Early PCB, Top with Components / Bottom showing Copper Foil

Point to point construction wire wrap

 A PCB can be of Single layer, Double layer or Multilayer
 A Multilayer PCB has many layers- Via is used to have
interconnection between them.
 A PCB is either Single Sided or Double Sided
 Single Side- Populated with components on single side.
PCB Types

 Flexible printed circuits were originally designed as a replacement for
traditional wire harnesses.
 From early applications during World War II to the present, growth for flex
circuits and flexible PCB’s continues exponentially.
 A flexible circuit in its purest form is a vast array of conductors bonded to a
thin dielectric film.
 A Flex Circuit or Flex PCB is a patterned arrangement of printed circuitry
and components that utilizes flexible based material with or
without flexible coverlay.
FLEXIBLE PCB

Components Type & their Footprint
Resistors
Foot Print(Axial)Symbol
Foot Print(Radial)

 Carbon film-Resistor
 Resistor network
 Metal oxide Resistor
 Wire wound Resistor
 Resistor – Metal film

 Electrolytic Capacitor
 Ceramic Capacitor
 Film Capacitor

 Electrolytic Capacitor

 Transistor
 Microcontroller

Pitch
Pitch of a component is the distance
between its leads.
1 mil = 1/1000 inch
1 mil = 0.001 inch
1 inch = 25.4mm
Grid of the Editor
It is recommended to keep the
grid value to 50 mil

Start menu All Programs Eagle Layout Editor
EAGLE Schematic Editor

Select File  New  Project (Name the project)

Next step is to create a blank Schematic editor.
Select File  New  Schematic (Save)
Blank Schematic

Search for Resistor, Resistors are available with different configurations and packages,
Select one as per your need.
Symbol Package
*resistor*

Search for Capacitor. My requirement is a Electrolytic capacitor of 16 mm
dia and 7 mm pitch
Symbol
Package
*capacitor*

Consider an example, which is shown below
BOARD EQUIVALENT TO THE SCHEMATIC

Placing the footprints, which is a collection of pads that represents how a component
mounts on to a PCB
Every time you move footprints, use Ratsnest
command which calculates shortest airwires.
Tools Ratsnest.

Routing the Board
Manual Routing Route manually

Routing the Board
Prior to Routing, Set and load Design Rule Check(DRC) data

Load Wire Clearance, Pad to Pad clearance and all other parameters.
Save the Design Rule for future use.
Check DRC – A message appears at the bottom left
Routing the Board

Auto Routing Tools Auto : for Auto Routing
Under General Tab- Select the Layers.
Example: If your PCB is a Single Layer . Top layer is used to mount the components and bottom layer for
routing, use above settings
Routing the Board

Auto router will route the board automatically based on the criteria set in DRC.
Routing the Board

Airwire:
Unrouted connection on a board, displayed in the unrouted layer.
Buried Via:
A plated through hole, which has been drilled through the current layer stack in the production process
like a normal (through) via, but does not connect all layers of the whole board.
Core:
Two copper layers applied to a solid substrate.
Design Rule Check (DRC):
EAGLE can identify the violation of certain Design Rules (e.g. if two different tracks overlap or are too
close) with the DRC.
Device:
A fully defined element in a library. Consists of at least one Package and one Symbol.
Device Set:
Consists of Devices that use the same Symbols for the Schematic but have different Package variant or
technologies.
TERMINOLOGIES

Drill:
Plated through drilling in the layout (in pads and vias)
Electrical Rule Check (ERC): EAGLE can identify the violation of certain electrical rules (e.g. if two
outputs are connected) with the ERC. It also checks the consistency of the schematic.
Forward & Back Annotation:
Transforms all the actions one makes in a schematic online into the layout (and with limitations from
layout into schematic). Both files are consistent all the time.
Hole:
Non plated through drilling in the layout (e.g. a mounting hole).
TERMINOLOGIES

OUTCOME
 At the end of the training:
I will be able to ………..

Queries Session
 It doesn't end here – It’s just a beginning.
 To be continued……

Outcome based Education
ASK – Attitude, Skill & Knowledge

Pcb design using_eagle

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Pcb design using_eagle