I2C程序设计，掉电保护功能。方便大家分享，学习进步，。-I2C programming, power-down protection. To facilitate sharing, learning progress.

多功能电子密码锁： 6位密码，密码错误时声光报警，可修改密码，带掉电保护 ，1602液晶显示，矩阵键盘输入。 -Multi-function electronics combination lock

一个简单易懂的电子称程序，通过12864显示，模块化编程，可预置单价，并计算重量，可显示实时时钟，具有掉电保护功能-A straightforward, said electronic procedures, through 12864, modular programming, can be preset price, and calculate the weight, can display real-time clock, with power-down protection