Microcontroller PIC16F887 Video 20 How To Interface Dot Matrix Display

Описание: Project Description

In this project we will interface the dot matrix display with PIC16F887 microcontroller. Rows are connected to PORTC and columns are connected to PORTD of a PIC16F887 microcontroller, and the microcontroller operated with a 4MHz crystal. We are using ULN2803 IC with ROWs, because microcontroller can not provide enough current for operating 64 LEDs of dot matrix display.

Dot Matrix Display
A Dot-Matrix Display is a display device which contains light emitting diodes aligned in the form of matrix. This Dot matrix displays are used in applications where Symbol, Graphic, Characters, Alphabets, Numerals are need to be displayed in static as well as scrolling motion. A typical dot matrix display is shown in figure below.

Types of Matrix Display
Dot Matrix Display is manufactured in various dimensions like 5x7,8x8,16x8,128x16, 128x32 and 128x64 where the numbers represent LED's in rows and columns. Also these displays comes in different colors such as Red, Green, Yellow, Blue, Orange, White.

Construction of Matrix Display
In Dot matrix display, multiple LED's are wired together in rows and columns. The matrix pattern is made either in row anode and column cathode or row cathode and column anode pattern. In row anode column cathode pattern, the entire row is anode while all columns serve as cathode and it is vice-versa in row cathode column anode pattern.

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