关键词：激光发射机;激光接收管;调制管
摘 要：A design of electronic laser harp based on SCM (the abbreviation for "single chip microcomputer") is proposed.It adopts the semiconductor laser transmitter and the receiving tube as a sensor,and uses the laser transmitter emits beams to imitate the 8 strings of harp.The main control chip STC89C52RC collects and processes the signal from receiving tube circuit,then STC89C52RC outputs special signal to produce sound of harp by audio.Compared with the traditional method,this design greatly enhances the anti-interference ability of the system,and it owns a certain degree of innovation and creation in not only the form of performance but also design proposal of system.