# Logic Levels

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Contributors: bri_huang

## Introduction

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

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

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?