Resources include C51 source code, proteus simulation map and compiled hex file AT89C51 microcontroller combined with character LCD display design of a simple countdown counter, can be used to cook instant noodles, boiled water or nap, etc.. Do a short time countdown, when the countdown count is 0, then issued a piece of music sound, notify count count end, do what should be done. The basic functions of timing alarm clock are as follows. The character of LCD (16 2) display. Display format TIME minutes: seconds seconds . With 4 buttons to set the current time to count down. Once the key is pressed, it begins to count down. When the count is 0, a burst of music. Procedures after the implementation of the work indicator LED flashing, said the program began to perform, press the operating key K1 ~ K4 action as follows. K1- adjustable count countdown time 1 ~ 60 minutes. K2- set counter count time for 5 minutes, show 0500 . K3- set counter count time for 10 minutes, show 1000 .

Listings
........\main.lst
........\project.m51
........\STARTUP.lst
Objects
.......\main.obj
.......\project
.......\project.build_log.htm
.......\project.hex
.......\project.lnp
.......\STARTUP.obj
design.dsn
design.PWI
main.c
project.uvopt
project.uvproj
STARTUP.A51

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