【摘要】：随着现代生活节奏的加快,人们遗失东西的现象经常发生,防遗失
产品也就应运而生.文中设计并实现了一款电子防丢器,它由发射部分和接收部
分组成,发射部分置于防丢物品上,接收部分由主人随身携带,发射器里有传感器，
只要接收器离开发射器 3 米远，音乐芯片就会报警。电路主要采用集成芯片制作,
有 NE555 型时基集成电路，TDA7000 型无线接收集成电路，CW9300 型音乐芯片。
【关键词】：NE555 时基电路 TDA7000 接收集成块 CW9300 音乐芯片
[abstract] ： With the pace of modern life quickening, people lost things
phenomena happen often, prevent loss product also is made. This paper designs and
realizes an electronic device, it by preventing throw launch part and receiving
components, launch part in preventing lost item, receiving part by owners carry,
launcher there, as long as receiver transmitter sensor leave 3 meters far, music chip
will alarm. Mainly adopts integrated circuit chip making, have NE555 type
time-based integrated circuits, TDA7000 type wireless access integrated circuits,
CW9300 type music chip.
[key words] : NE555 time-based circuit TDA7000 receive manifold blocks
CW9300 music chip
