This is the very simple way to play a song with single 1.5 battery. You can build this circuit for gift acceccories. When the gift opened, then a song will be played.. It’s easy and cheap right..? 😀 . It just use a single small chip which will generate a song which already planted inside the chip.
Melody Generator Circuit Diagram:
Components List:
C = 1uF
R = 4.7KW
Q = 2SC9013
About IC M66T series:
The M66T series is a CMOS LSI designed melody generator IC for use in telephones and toys application. It has an on-chip ROM programmed for musical performance. Produced by CMOS technology, the device results in very low power consumption. And with built-in RC oscillator, a compact melody module can be constructed with only a few additional components.
M66T Pin Assignment:
The following are the M66T series and the song generated by its series:
Source: kitsrus.com
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