Hi all, first post here so go easy on me. I come from a coding background and have very little knowledge of circuits so forgive the basic questions. I’m on a journey here
So, I don’t understand why this setup doesn’t need resistors:
where as this setup does:
I’ve bought an ESP32 controller and want to connect an ultrasonic sensors to it. Do I need the resistors, if so, could someone explain why I need them.
As I said, I’m at the beginning of my circuitry journey here