You Are Here: Home » AVR ATmega Projects » 4×4 Matrix Key-board Interfacing with ATmega32

4×4 Matrix Key-board Interfacing with ATmega32

Here is a project for beginners to interface a 16-key (4×4) keypad with ATmega32 using 8-pins i.e. one port of the microcontroller. This is useful particularly where we need more keys but don’t want to spend more uC pins for interfacing.

The 4×4 keypad is a standard one available in the market. I’ve used here one from my earlier project. The LED shown in the schematic is just extra, which can be used anyway you like.
Here, the mega32 reads the code of key pressed and sends relevant character to display on LCD 2nd line. The first line displays ‘WELCOME’ all the time.

The figure below shows ISIS Proteus Simulation of this code:

ISIS Proteus Simulation

Read more : 4×4 Matrix Key-board Interfacing with ATmega32

Leave a Comment

You must be logged in to post a comment.

Read previous post:
C/C++ Interpreter Ch and Embedded Ch 7.0 for Solaris Sparc 64 Bit Released

Davis, CA (PRWEB) May 21, 2012 SoftIntegration, Inc. today announced the availability of Ch 7.0 and Embedded Ch 7.0 for...

Scroll to top