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61

Lesson 12 Driving Dot-Matrix by 74HC595

Introduction

With low-voltage scanning, dot matrix LED displays have advantages such as power saving,

long service life, low cost, high brightness, a wide angle of view, long visual range,

waterproofness, and so on. They can meet the needs of different applications and thus

have a broad development prospect. In this lesson, we will learn how to use 74HC595 to

drive an LED dot-matrix.

Components

- 1 * Raspberry Pi

- 1 * Breadboard

- 2 * 74HC595

- 1 * Dot-Matrix

- Jumper wires

Principle

Dot Matrix

The external view: