OK, here is a properly updated version of this part. Fair warning, something I managed to do in the test sketch has managed to offset the silkscreen in the gerbers (for only the test sketch, just a part has the silkscreen correct) which I can’t see any reason for so I think the part works. If I get ambitious (or bored or frustrated with development ) I may fix this properly and renumber the pins. As it stands the pin numbers are not contiguous and that usually causes problems with the hover on the pin and it displays the description code although in a quick test I can’t see it happening. The down side to making this change (and why I didn’t do it here) is that it will break all existing sketches. This may be good enough, we will see.
Here is the fixed part:
Edit: replaced with a corrected version:
Edit2: add the VTP pin to the 5V bus
Edit3: removed RST from bus as they are all seperate, centered the usb connector and CPU chip in breadboard. Waiting to see if more bus changes are needed.
Edit4: (may be a record ) Fix one pad in pcb that was off by 0.25mm
Mega2560 R3 Pro Mini_fixed.fzpz (45.8 KB)
removed the test sketch because it is now old …