As soon as the design is complete, your board is ready to be printed. While there are instructions online for creating your own board, I recommend that your first one be professionally manufactured. In this lesson we will go over generating gerber files for manufacturing, reviewing your gerber files, and then a little bit about selecting a manufacturer.
Once you have your schematic drawn out in Eagle, it is finally time to lay out the circuit board. This may seem like it’s going to be very complicated, but it is actually not that bad. The process is fairly straightforward. It is just a matter of taking your time and carefully thinking through what you are doing. By the end of this lesson, you should have a circuit board that is ready for production.
Before we can lay out our circuit board we need to do a host of preparatory work. This includes creating a schematic both on paper and digitally, and setting up a project within the Eagle software. Creating a schematic is not just a helpful step, but a necessary step in the Eagle design process. The circuit board file is linked to the schematic file, and any change you make to the schematic will eventually have an effect upon the layout of the board. Albeit this may all seem like a lot of extra work, you will be glad you did all of this later.
In this class we are going to learn how to convert a circuit from a mess of wires on a breadboard into a custom printed circuit board. This class is intended for hobbyists who want to take their projects to the next level and produce an end-product which is more finished. The benefit of designing a circuit board for printing is that it is cleaner and more reliable than a circuit built on a breadboard or perf-board. The other main benefit is that it is repeatable. If you need to make ten boards, it will save you a lot of time to have a custom board printed.
This is an introductory level class and we will not be going over more advanced topics in design and testing that would help you make your board ready for consumer manufacturing, but the skills covered here are a stepping stone to making professional-quality circuit boards.
There are many different types of Printed Circuit Board materials in the market these days. The common ones are FR-1, FR-2, CEM-1, CEM-3 and FR-4 . The thickness of the PCB can be 1.0mm, 1.2mm or 1.6mm. They can be single sided or double sided with cooper clad of 1 oz or 2 oz.
These are the common low cost PCB that electronics hobbyist or students can use for their projects. Of course there are more complicated multilayer PCB that are used in the industry for various applications.
The followings are the suggested PCB design rule that you should try to adhere to in order to minimize the cost of fabricating the PCB. This design rule is specifically done for electronics enthusiasts as well as students who are still not familiar with the fundamentals of PCB design and layouts.
In the PCB design of electronics circuit, it is important that one plan and has a checklist of the do’s and don’ts before proceeding to do the printed circuit board layout. The understanding of the circuit is critical to the design, for example one needs to understand the maximum current and voltage that are carried by each conductor in order to determine the track width of the conductor and the type of PCB that will be used.
I have made a layout using eagle then save it as PDF to print a test paper before routing.
I didn’t design any package its all eagle’s packages. I exported PDF as shown on the image but the problem is : the atmega16 and l293d and even ne555 packages are all scaled down on the printed paper ! as you can see on the other image i put the real component aligned with the printed paper but they didn’t match ?!
What did i do wrong ?
Thanks to All replies i found that printing shop was printing it wrongly they print PDF from adobe x ver. 10 without correcting the print setting adobe has option under print -> size option -> check Actual size