Making Printed Circuit Boards with Orcad Layout Part 5

	The mounting holes are treated just like components.
	Add them just like you did the header, except use the Layout library and the footprint is MHOLE 1.

	Now we need to add the header pins to the nets.
	Select the Pin button .
	Double click on pins you want to add to a net.

	This shows us the name of the Pin "J2.1" and its net "-" or none in this case.
	Use the pull-down list to select the net you want, but this will only work for nets that have two or more pins in them already.
	To add pins to nets that have less than two pins, you must first get the name of two pins you want to add.
	I want to add "J1.3" and "R5.1" to the "Sum In 3" net. From menu go to Tool -> Net -> Select From Spreadsheet... Select net from spreadsheet and right click. Pick "Connections edit" from pop up menu. Type in pin numbers. Make sure that "Add" is selected and press OK.
	Connect all pins.
	To check which pins belong to which net, right click on a net from the spread sheet (Tool -> Net -> Select From Spreadsheet...) and go to "Properties"

	Check off "Highlight" and then press "OK"
	Pins that belong to the net and their ratsnest are now white.

Now it's time to lay down some traces. Go to Auto -> Autoroute -> Board, and the board will route the traces. Check that all the traces are red and blue. If other colors are present, you didn't turn off on of the layers.  Click here to go back to that section. This board could now be sent out, but the traces are pretty thin. To make the traces wider,  go to the "Edit net" dialog box (Click here to see how to do it). I use 25 for signals and 50 power and output. Grounds I like thick, but since it can go all over the board, I will set "Min Width" to 25 as well as "Conn Width" and "Max Width" to 50. Now unroute the board by going to Auto -> Unroute -> Board, and the board will route the traces. Now reroute it with the new numbers.

Now we are ready for the Post Processes.

Go to "Making Printed Circuit Boards with Orcad Layout Part 6"