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Teclado matricial de 4x4


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By witsuk - Posted on 21 February 2009

La salida y entrada de datos para un proyecto de electrónica, es muy necesario. En el caso de salida de datos se pueden usar los LCDs, Display de 7 segmentos, etc. y para la entradas se puede ocupar un teclado matricial. Este dispositivo, contiene varias teclas, los cuales sirven para introducir los datos por ejemplo a un microcontrador, que realiza la función de calculadora, marcador telefónico, cerradura electrónica y una infinidad de aplicaciones.

 

 

Teclado matricial.

 

Como hacer un teclado matricial. Ver pagina....

 

DESCRIPCIÓN:

La mayoría de los teclados se leen por una técnica de exploración consistente en ir leyendo consecutivamente las filas o las columnas de éste. Hay circuitos especializados en esta tarea, pero es fácil hacer que un microcontrolador lea estos teclados matriciales (los ordenadores compatibles PC incluyen un pequeño microcontrolador que hace esta tarea y envía las teclas pulsadas a la unidad central). La disposición en matriz de los teclados responde a la necesidad de leer gran cantidad de conmutadores con pocas líneas de entrada, piénsese en que si se necesitase una línea por cada tecla del teclado de un PC, serían necesarios más de 100 líneas. El esquema muestra un esquema de un típico teclado matricial 4x4 y la conexión directa a un puerto del microcontrolador. Las resistencias de pull-up no son necesarias en el caso de que el teclado se conecte a puertos con pull-up interna (P1, P2 y P3).

Descarga Del Esquematico Del Módulo Teclado Hexadecimal

Conexión del teclado al microcontrolador


Um teclado matricial que usa o principio de detecção da capacitancia do corpo, então só um toque basta para acionar, por isso não usa partes mecânicas, e não esta sujeito a desgastes. SEO Services
Dr. Mohindar Sachdev's supervision. Sandro's studies were in the fields of modeling of numerical relays reseller web hosting, transient studies of protective devices, and analysis of weak power systems.These academic interests were a wonderful fit for Electrocon; we found him through an international network of academic colleagues and Electrocon users ecommerce web hosting. Outside of work, Sandro enjoys playing soccer, running, swimming and outdoor activities. He plays the guitar and enjoys reading, painting, and drawing. Sandro loves talking about philosophy and social and political themes. But his great passion is enjoying time with his wife and two children. He is also constantly in contact with his (huge) family and friends on the other sides of both North American borders. Daryl B. Coleman - Software Architect and Lead Data Engineer Daryl joined Electrocon in 1993 and quickly mastered the CAPE environment, building data models in the CAPE library budget web hosting. His first real programming assignment was tackling CAPE’s old Database Editor, which was the largest single program in CAPE, and converting it to the PC. He developed our first two-way interface between the CAPE database and a manufacturer's relay test software. He jumped at the opportunity to take the lead in developing a completely new Database Editor that is now CAPE's standard interface to the database. He is now the primary architect and innovator for the CAPE Database Editor and a contributor to many other CAPE modules. For example, he designed and implemented the graphical user interface for Line Constants data, the data merge function, and functions for network merge, external model replacement adult website hosting, and network comparisons. He also developed the pilot protection wizard for fast modeling of teleprotection schemes.

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