EAGLE

1. The first step is to go to libraries, select "fab.lbr" and right click and select "use".

2. Next is to create a new "Schematic"

3. Adding components is really simple in Eagle, especially once you have Fab library downloaded, one can get pretty much everything needed for hello echo board. Simply click "add" icon on the left panel and select components needed for the board.

It is important to check the diagram that appears on right when you click on the names on the left, this will help you to pick the correct component.

4. Next step is to add the connections. It is called "net" in eagle. Hold shift to draw straight lines

5. To add values to the component, select "info" and edit the information.

6. Step by step I arranged all the components and connections as per the referece board. After that I ran an "Erc" check to make sure all my connections are working. I discovered 0 errors but 2 warnings. I had to give value to the "button" and then my board had 0 warnings too.

7. This is how my schematic looked like. Then it was time to convert my "Schematic" to the board.

8. Next I arranged the board with reference to the fab hello echo board. Next was to turn off all the layers except "top" and "dimensions"

"Top" layer has everything that has to be scored from the board and "dimension" layer has the boundary which needs to be cut.

8. after this I got the fab.dru from one of my batch-mates, Gautam, which has to be used to run a "DRC" check. This file contains the rules for Modella. I found only 1 error of spacing and I fixed it. After that I exported the board to png and my file was ready for milling.

9. While milling, the circuit is milled using 1/64 inch bit because it is only scored on the copper board.

However the border needs to be vut, so we use 1/32 inch bit. To follow this process, it is important to have 2 separate pngs for the border and the circuit.

10. Once my milling was done, I started soldering my board using the required components.

Once the soldering was done, I tested the circuit using Multimeter to check whether there is any shorting or not and then it was time to try programming.

Final files can be found here.