AVR242: 8-bit Microcontroller Multiplexing LED Drive & a 4x4 Key

Updated: Feb 24, 2005

Description

This application is designed to show the versality of the AVR port configuration, and the efficiency of the rich instruction set. Only 15 dual function I/O pins are used to run a 4x4 keypad, a 4 digit multiplexed LED display with flashing colon, an industrial real time clock/ timer, a piezo-sounder and to control ON/OFF times for two loads. A complete program is included for the AT90S1200, which can easily be modified to run on any AVR microcontroller with 20 pins or more.

Categories

• Appnote : Math/Processing Applications

Version	Presented by	Price	Rating
AVR242	(Find Distributor)	Free!