You will also encounter issues here. Transistor is a sensor. It detects voltage on the base pin. Transistor density and so sensor density on a modern CPU is re

You will also encounter issues here. Transistor is a sensor. It detects voltage on the base pin. Transistor density and so sensor density on a modern CPU is really high. In fact modern CPU transistor density is 3 orders of magnitude higher than nerve density even on your retina. It's at the order of ~100,000 rods/mm^2 for retina and ~100,000,000 transistors/mm^2 for modern CPU.