Let’s start from this complete ISIS Proteus schematic
this microcontroller circuit has the following components:
4 diodes 1N4148
2 NPN transistors BC547
2 electrolitic capacitors CAP-ELEC
2 zener diodes a 3EZ8V2D5 and a 3EZ5V1D5
3 resistors RES
a connector D-type 9 pin female CONN-D9
a PIC microcontroller PIC16F877
the PIC16F877 has two hidden pins VDD and VSS, the VDD pin must be set as POWER and the VSS pin must be set as GROUND. When you add a component in ISIS , some components are automatically configured with a PCB footprint, while other components don’t have PCB footprint associated with the component, and you can add it manually. In this case, you must add the appropriate footprint as in the CAP-ELEC example below:
Open the Properties dialog box for the CAP-ELEC component. Click the ? Button to open the PCB package selection dialog
Choose a suitable PCB footprint, click OK to finish. Select the PCB footprints for all the components, then open the Netlist Compiler from the Tools menu of Isis Proteus menu Tools -> Netlist Compiler. The settings dialog box pops up, keep the default settings, click OK to generate the netlist file. After the file has been generated, from the Tools menu select Tools -> Netlist to ARES, this will launch ARES software. You can also use the corresponding button on the toolbar to complete this operation.
As you can see that the work area is empty , and we want to use all the elements placed in the list on the left.
Before placing the components, we must draw a border, we use the 2D Graphics Box Mode button to draw the border
Before starting to draw ,we must first select the color, since this is a border, we choose the yellow color (Board Edge), as we can see on the setting tool at the bottom of the main window.
Click in the workspace, hold down the left button ,drag a rectangle of appropriate size ,release the button.
If you later want to modify this size board, you need to click 2D Graphics Box rectangular icon again, right-click on the corner of the board: a control point appears,drag the control point to resize the board. Let’s return to the components placement view by clicking the icon below
Now put the components into the board, in order to get a general view, click F8. This is the result