If you love playing around Arduino and are looking forward to its extension like building a shield with labeled connections along with a schematic and PCB layout to plug into the top of your Arduino, then the tutorial of Aaron Eiche can be a great help to you.
The tutorial of Eiche will teach you about the basics of EAGLE, which is a complex program but awesome to use for laying out the PCB. Before going through the project, make sure to devise a strategy for your shield as the tutorial will be of no help in this category. The shield will be used to connect the sensors. Next is schematic, which will be apparently the blueprint for your circuit as it deals with the process of connection between everything related to this project. Therefore, it should be simple and readable.
The fun part of this tutorial is the making of a board where the circuits are to be held together in a way that makes some sense. The orientation of board is already dealt in advance in Arduino and the shield is only going to plug in one way. Moreover, various layouts of the board are already fixed. After the circuit is completed, the sucker is turned into Gerber files and are shoot off to the fab house. Gerber is a common name of the files which is sent to a manufacturer so they know what to do to make your board.
The electrical section and the designing part must be checked to make sure that nothing is electrically wrong with the design and also that the fab house can actually produce it. At last, they all are zipped up together and send to the board house. The project includes a lot of files and they are available on the download page of the website. The project has been minutely dealt with every section to build extensions for your Arduino. Further, you can either make a circuit or order it from the following website.
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