john1993:
pro: 19x33x12=7524 SOCKETED " chip with lots of pins soldered to it": 18x34x10=6120so quite a bit smaller than pro.
...if you cheat a lot in height.
I don't know where you got "12" from but 19x33 isn't really much different from 18x34
john1993:
imo a huge waste. your pins are too far away from the dip, the led is about 10x bigger than necessary, similar redundancy of signals as promini, and...
I wasn't trying to make the smallest possible PCB, I just wanted something that was quick to put together and easy to connect an ISP to.