说明：  这是我的一个单片机竞赛设计，功能是可预置密码的无线防盗报警器。可以自己设置密码，红外线检测有“小偷”报警，如果有正确的密码输入则不报警。
(This is my design of a single-chip competition, functions can be preset password wireless burglar alarm. Can set a password, infrared detection of a thief alarm, if the correct password is not the police.)