Hey, so I'm building a bunch of NOT gates the basic way for a fun address bus system. I understand the concept but now I'm trying to decide which parts to buy.
In this pic is a basic NOT gate. Since I'm using arduino, my input signals will be ~5v. Can I not just use a 2n2222 for the transistor and skip R1, or is it necessary to have a resistor there?
Also, what might you recommend using for R2?
Thanks very much!