Light controlled music integrated circuit

KD-154B is a CMOS large-scale music controller that can directly drive the buzzer to produce sound and is connected to a photosensitive circuit. In the Ming Dynasty, you will get married. Guanwang Kegui can
be used as ordinary music IC, and can also be used as light-controlled reminders, alarms, light-controlled toys, handicrafts, etc.
As shown in Figure 9-34,
  (1) Characteristics
  1) Working voltage range (2~3.6V);
  2) Very small static consumption;
  3) Built-in RC oscillator;
  4) Built-in pre-amplified direct drive buzzer;
  5) Several application circuits to choose from (light control or non- light control )