Design a simple microcomputer counter from bottom, can put in use in the home, such as cook instant noodles, boiled water or take a nap, do a short period of time to time, when the countdown to zero, then sends a music sound, notify the end of the countdown, some important things to do,
Design requirements:
1. Has the basic function of clock display and adjust,
For example: press K1, choose adjustment time, time
Operation key K2: increase the timer 1,
Operation button K4: set up,
2. As the countdown counter when using specific requirements are as follows:
(1) LCD display the countdown time,
(2) has four key operation to set the time now want to timing,
(3) after the reset the default countdown time for 5 min, display "05"
(4) the key operating a key K2 and K5 action is as follows:
Press K5, digital tube display "05",
Operation key K2: increase the countdown 1 min,
Increases the operation key K3 countdown 10 min,
Operation button K4: set up,
3. Can add auxiliary function

Made of 51 and 1602 LCD

CodePudding user response:

I hope it can help you: https://blog.csdn.net/it_xiangqiang/category_10581430.html
I hope it can help you: https://blog.csdn.net/it_xiangqiang/category_10768339.html