Uno or Mega, the pin connectors are all 0.1" spacing. On one side there is a 0.1" gap between set of analog pins and other pins. On other side, they all are digital pins but there is a 0.05" gap between the 2 sets of connector.
Did anyone ever explain why the different gap spacing? And is 0.05" right? It seems odd to me.
I am trying to make ISP shield for 8535/84/164/324/644/1284 MCU that uses 40 pin DIP. I've used them a few times and I am tired of hand wiring them on breadboard to burn bootloader. It'd join my family of '328 (28 pin DIP) shield, ATTiny 45/85 shield, and ATTiny 24/44/84 shield.