Logic Levels

Contributors: bri_huang
Favorited Favorite 90


We live in a world of analog signals. In digital electronics, however, there are only two states -- ON or OFF. Using these two states, devices can encode, transport, and control a great deal of data. Logic levels, in the broadest sense, describes any specific, discrete state that a signal can have. In digital electronics, we generally restrict our study to two logic states - Binary 1 and Binary 0.

Covered in This Tutorial

  • What is a logic level?
  • What are common standards for logic levels in digital electronics.
  • How to interface between different technologies.
  • Level shifting
  • Voltage Buck-Boost Regulators

Suggested Reading

This tutorial builds on basic electronics knowledge. If you haven't already, consider reading these tutorials:

What is a Circuit?

Every electrical project starts with a circuit. Don't know what a circuit is? We're here to help.

Voltage, Current, Resistance, and Ohm's Law

Learn about Ohm's Law, one of the most fundamental equations in all electrical engineering.


Binary is the numeral system of electronics and programming...so it must be important to learn. But, what is binary? How does it translate to other numeral systems like decimal?