Below are the steps to develop a schematic and develop its PCB layout in EAGLE Software.
Step 1: Develop a New Project
Goto File > New > Project. Give it a name. Here I have given name of the project as blinking led.
Then Right click on Project and click on new schematic.
Step 2: Adding Components to Schematic
I'm going to develop a schematic for blinking led using 555 timer.
The required components are :
-1 555 timer
-2 resistors - 33k ohm and 470 ohm
-1 BC 547 transistor
-1 100uf capacitor
Components are added to the schematic using Add button as shown in the picture.
Type the required components in the search box. Select the component and click OK/ Drop.
Below are the components that I added in the schematic.
Component : 555 timer
Search-box : ne555
Library/Name : st-microelectronics
Package/Description : DIL-08
Component : Resistor
Search-box : resistor
Library/Name : rcl
Sub-library : R-US
Package/Description : 0207/10
Component : BC 547
Library/Name : Transistor
Package/Description : TO92
Component : 100uf capacitor
Library/Name : rcl
Sub-library : E2,5-7
Library/Name : led
Sub-library : LED
Package/Description : LED5MM
Component : wirepad
Search-box : wire pad
Library/Name : wirepad
Sub-library : WIREPAD
Package/Description : 2,15/1,10
Note: Instead of power-supply, i have taken wirepad.
Right click on each component and give values to it.
Step 3: Wiring the Schematic
Click on Wire button. Wire the schematic as shown in the picture.
However, a wire in EAGLE is just a line. If we want to connect more than two wires, we need to add a Junction as shown.
If extra information is to be written on the schematic, use text tool.
For detailed wiring connection goto the link mentioned below
Step 4: Wiring the Components in PCB Layout
-Click on Generate/Switch to board button that is shown in the picture.
-Move all the components into the the box. Adjust all the components very close to each other and reduce the box size.
-Wire all the components.
(If needed, you can add your company name in your PCB layout by Text button.)
-Then click on Polygon tool and select the border.
-Keep only Bottom, Pads and Dimension visible and rest should be invisible.
-Click on Ratsnest button.
- Now, Click on File > Export > Image. A new window opens, give the name, location and resolution for the picture , Check Monochrome and the image would be saved. Convert it into negative image.
Finally you're done with PCB layout.