在单片机AT89S52的控制下能实现，遮住不同的激光弦时放出不同频率的音调，按下播放音乐按钮时，播放《生日快乐》，手动复位等功能，并且通过彩灯来显示被遮挡住的弦。-To achieve under the control of the MCU AT89S52 cover different laser chord emit different frequency tones, play music button is pressed, the play " Happy Birthday&