| 摘要 |
PURPOSE:To reduce the number of parts by connecting a power source to one terminal of a melody producing integrated circuit through a load and connecting the other terminal of this circuit to the opposite polarity of the power source. CONSTITUTION:The plus side of a battery 1 is connected to one terminal of a speaker 7, and the other terminal of the speaker 7 is connected to a plus power terminal 3 of a melody producing integrated circuit 2, and a minus power terminal 4 of this circuit 2 is connected to the minus side of the battery 1. Since they are connected in this manner, the current flowing to the melody producing integrated circuit 2 is made flow to the speaker 7 and the current flowing to the melody producing integrated circuit 2 is matched to the waveform of sounds to be emitted to emit sounds from the speaker 7. Thus, the number of terminals of the melody producing integrated circuit 2 is only two and the man-hour required for wiring is reduced. |
