To get full information or details of digital code lock with lcd and keypad using atmega16 please have a look on the pages

http://seminarsprojects.net/Thread-digital-code-lock-full-report

if you again feel trouble on digital code lock with lcd and keypad using atmega16 please reply in that page and ask specific fields in digital code lock with lcd and keypad using atmega16 ....etc

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ppt for keyboard interfacing with 8051
ppt for keyboard interfacing with 8051 ....etc

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please go through the following threads for more details on Digital Code lock with keypad and lcd using AT89c2051

http://seminarsprojects.net/Thread-digital-code-lock-with-lcd-and-keypad-using-at89c2051
http://seminarsprojects.net/Thread-digital-code-lock-full-report ....etc

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Combination Lock with LCD and Keypad using pic16f628A:

A Brief Description:

This project is written in C language. The basic user lock is of 2 Digits.
The input is taken from a 4x3 Keypad (please see the schematic for more information) and Display the user input on a 2x16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration I have connected an LED to that pin.


How combination lock works:

1. Turn switch on (5V DC voltage power supply)
2. A message name ....etc

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ABSTRACT

Linux is a popular operating system for embedded systems. Linux has come a long way since its humble beginnings in 1991.Today Linux supports a very wide range of platforms, from Embedded Systems based on ARM, PowerPC, Intel, and Hitachi microprocessors. It also served as a launch pad for the open source movement, and consequently leads to great interest. This project describes one such application of Linux of generating software for interfacing Graphics LCD using hardware ARM9 Single Board Computer. Uses sensor card to get da ....etc

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A Brief Description:
This project is written in C language. Its a simple project with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy for an intruder to break the lock unless you keep the code simple.The input is taken from a 4x3 Keypad (please see the schematic for more information) and Display the user input on a 2x16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration i have connected an LED to that pin.

referanc ....etc

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To get full information or details of quiz buzzer circuit using led and buzzer without using led display please have a look on the pages

http://seminarsprojects.net/Thread-8-candidate-quiz-buzzer-using-8051-micro-controller-at89c51

if you again feel trouble on quiz buzzer circuit using led and buzzer without using led display please reply in that page and ask specific fields ....etc

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Abstract

A keypad consists of 3 columns and 4 rows, hence the name, whenever the user taps one button, the column and the row corresponding to that button are shorted, for example, if a user chooses to tap the 5 button, col2 and row2 are shorted, if a users picks 0 button, col2 and row4 are shorted, and so on.

So how do you read a keypad using a Microcontroller?
the method used to read such input is called Scanning, you connect the rows and the columns to the microcontroller, you set the columns as outputs, rows as inputs (or vice versa) ....etc

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i have very big problem to interfacing key pad with at89s52 with lcd. how is the asm code for this. i want to use keypad as when i press any key it should show on lcd.

if you will help me i will always greatful to you.
thanks
[email protected] ....etc

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To get full information or details of digital code lock with lcd and keypad using at89c2051 please have a look on the pages

http://seminarsprojects.net/Thread-digital-code-lock-with-lcd-and-keypad-using-at89c2051

http://seminarsprojects.net/Thread-ppt-digital-code-lock-with-lcd-and-keypad-using-at89c2051-ppt--41343?pid=87732&mode=threaded

if you again feel trouble on digital code lock with lcd and keypad using at89c2051 please reply in that page and ask specific fields in digital code lock with lcd and keypad using at89c2051 ....etc

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