I started from the design of Nicola, that redesigned Neil's fabISP to integrate the USB connector
I tried to keep all the traces more compact in a smaller area on the buttom right corner
Here is the image of the modified fabISP
While my new design was having some problems of laser engraving, I started from the board of Silvio to connect parts
I placed all the parts in the correct position just to be sure not to forget something and to select the right soldering order for the parts
The first soldering attempt went wrong
In the meanwhile my fabisp design still had some problems...
After some practice I finally made my FabISP.The problem with my engraving was the copper sheet that was slightly bent producing the laser to be out of focus, I solved the problem by selecting a proper sheet and had my design made.
I followed the programming instructions on the tutorial from 2015 FabAcademy
...but I faced some errors I wasn't able to solve right away.
I managed the first error thanks to Francesco that shared with me the link to this forum http://www.avrfreaks.net/forum/windows-81-compilation-error
On the "fuse" command I stopped again. This is probably due to my bad soldering ability.
I than decided to start the soldering from the beginning on the FabISP I designed. This time it went a lot better.
I finally got my FabISP working and ready to be program.