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Light Control Music Integrated Circuit

2014-11-07 02:45  
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Light Control Music Integrated Circuit
KD-1548 is a large-scale integrated circuit. It can realize the function of light control through connecting photo-resistor (CDS) externally; it can also work as an ordinary music integrated circuit. So it is widely used in electric reminders, alarm devices, electric toys, crafts, etc.The typical application circuit of KD 1548 as light control trigger is as shown in the figure(a) ; While figure(b) shows the situation when it is used as a common music integrated circuit. At this moment, if pressing the button OSH only, the circuit will be triggered and it will automatically stop when a song is finished. If pressing LH, the music will start, but it will stop once you loosen LH.