Okay, I got EagleCAD running – thanks for the advice (didn’t know it was freeware).
One question that would greatly help–
The BOM for v1.3 is not at http://goo.gl/4Nrvb and the EagleCAD silk screen also doesn’t say anything on the blown part (see attached – the charred area between LM2596S-5.0 and 5.6V zener (D3). Is this a fuse and what value and part #? No info on the sch. file either.
I blew this part *probably* because I added a nearly 5000uF cap on the +5V?? Maybe it’s the surge current to charge the cap that blew it although I am surprised since it shouldn’t be that much. I will try moving this cap before the LM2596 to see if that might help. (It seems like the 2A fuse also blew — totally inexplicable!)
Had to do this since there is a 120VAC pump motor that puts a dip on the line voltage that travels all the way to +5V and freezes the RPi and other electronics.
Any technical advice would be deeply appreciated.