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The eagle cad tool is a great thing. It does have something that I see as a draw back. That is that you need to pick a package for your part while y...
That step should be self explanatory. In linux type eagle from the command line. In windows double click on the eagle icon. Or start-programs-eagle la...
Decide where you want your new part to be. I suggest creating your own library. If you have your own library it will be easier to share your work wi...
Your screen should like like this. From here on out I will assume that you created a new library, but this really doesn't matter.
To design a part in eagle you must define a device, package, and symbol. Each aspect has its own set of layers that you must keep straight. Again ...
For this instructable we will design a part used in the IMU for the PSAS rocket. The object of our affection is the ADXRS150 gyroscope from Analog De...
As I mentioned there are three aspects to a part in eagle. We will start with the package. We want to make a 32 lead BGA (Ball Grid Array). From th...
click on the package icon in your library window. The edit box will pop up and in the "new" field type BGA-32 (remember we are making a 32 lead Ball ...
The default eagle setup will create a black screen with a grid on it. In the center will be a dominant white cross. This cross is the center of our ...
Recall the data sheet has balls that are .55mm in diameter and are spaced .8mm apart on center. The centers of the balls on parallel outer edges are 4...
At this point if you want to copy another package from an alternate library you can use the copy command with the following syntax in the command win...
On the tPlace layer put an outline of the chip's foot print and make the Ball A1 indicator visible with the wire tool. Type wire in the command wi...
To make our life easy in the furture its a good idea to name the pads. Type name in the comand window, and double click on each pad. A dialog box wi...
name and value parameters are added on separate layers tname and tvalue respectively. These will be named later on by who ever is using the package so...
Click on the symbol button and add a new symbol. This step is identical to step 7 except its for a symbol not a packge. The symbol is what will appe...
On some devices not all pins are used. However for this device all the pins are doubled up. We can also see that all the pins have names. To make ...
Use the wire tool to draw a box that will represent the symbol on the schematic. By default you will be drawing on the symbol layer. Double check to...
As great a names as P$1-p$32 are it will make our lives easier when we connect pins on the symbol with pads on the package if we use a more intelegent...
In this step the association between the symbol and the package is made. Click on the devcie icon, add the name of your device, and your screen shoul...
In the lower right hand corner click on the new button and select the package. Your package will show up in the upper right pane. On the left vert...
If you have followed my advice and named the pins on the symbol and the pads on the package the same this step should be easy. Click on the connect b...
CONGRADULATIONS!! YOU ARE DONE. Click on the save button. It always a good idea to check all is well, so navigate to your library, and expand it by ...
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