Design for In-Lab Manufacture

Getting Started

In the schematic editor with your project open, press control and b or go to File> convert to PCB. You will now have Layout Manager pop up with all the components in their physical representation. You will also observe that there are lines drawn from component to component. These are the lines you made in schematic editor. Be aware these lines can go away for a number of reason such as removing a trace. I highly recommend that you check the need help section if anything goes wrong.

Layout Manager window

Tools:

Since so many of the tools are similar to the schematic editor, I will not go into detail about them. Please refer to the schematic editor section of this tutorial if need to.

Layout Manager Tools

Step One: Positioning

Among all the components we've created a few of them have to be positioned in a particular location in order to fit the chassis. To accurately position the component, right click on the component and select properties. This may be tricky as you have to avoid right clicking on the pad of the component. If the mouse is on the component, the component will turn light blue. If your mouse is over the pad, it will turn red. In the properties box select positioning. There you will see a spot to put in an X and Y coordinate. Below are the components needed to be positioned and their coordinate.

At this point I expect you to know how to switch between the different units of measurements, make sure not to mix mm with mil.

LED: X= 37.49mm Y= 15mm
Switch: X= 13.74mm Y= 15mm

The next thing we need to position are two mounting holes. The icon for the mounting hole with be a gray circle. Select it and place two in the work space. Right click and select properties on both a set the following values:

Hole 1: Outer Diameter= 0mil Hole= 125mil X= 5mm Y= 15mm
Hole 2: Outer Diameter= 0mil Hole= 125mil X= 45mm Y= 15mm

Next, right-click on the SMT chip and select "Change Side."  You should now have all, but your SMT chip on the top side.

Step Two: Setting Up PCB Border

The next thing we need to do is set up the border of the board. Go to Route> Board Points. Select the check box create rectangular board. Set height to 30mm and width to 50mm.

Step Three: Setting Up PCB Border

Now that we've positioned certain components and set up the border, you now have a general idea of where you can place the other components. Place the components such that there's enough space in between for the reference designator to show (the text size is about same size as the resistor's width). The only other limitation is that the pad for the plug is on the same side as the switch and the two alligator clip wire pads are on the opposite side. Remember, although some components can not be moved, you can still rotate them. If you need help figuring out where to place your remaining components, feel free to use the example below. After you think everything is properly placed, right click on properties and go to marking. Position the Reference Designator anywhere other than the center of the component.

Graphic of components layout example

Step Four: Setting up the Rules

Click on Verification> Design Rules and select the clearance tab. Set everything, except board outline to 20mil. Set Board outline to 50 mil.

Design rules window

Step Five: Making the Connections

Click on Route> Route Setup and set everything, except board Clearance to 20mil. Set Board Clearance to 50 mil. As tempting as it is to use the auto router to do all the routing, it generally doesn't work that well. Instead, manually connect the components with the trace tool. Make sure all traces are done on the bottom side. If you ever want to start over with the traces just go to Route> Unroute All.

Route setup window

board top and bottom graphic

Step Six: Check your Work

Once you are ready to check your work go to Verification> Check Design Rules to make sure your traces aren't too close, Verification> Check Net Connectivity to make sure everything is properly connected and Verification> Compare to Schematic to make sure nothing was changed from the schematic. If you have a problem with the design rules (red circles on the board), modify your traces. If it's a problem with connectivity, there's a connection you forgot to make. If it's a problem with the schematic, see the need help section.

Step Seven: Adding Text

Using the text tool type RED above the positive pad of the plug and BLK (for black) under the negative pad (make sure top silk is selected). Now with any room that is remaining, type your initials in that space. You are now ready to send off your board!!!

Top Silk selection window

Don't forget to save your work!!! You may need it later.

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