BT8031 - NPN transistor
The BT8031-XX is a CMOS LSI chip, which plays a prearranged melodies.
The ROM has a 127 words and can store up to two melodies with double sound sources, and it uses the built-in digital envelope circuit.
SONG LIST 5 MO 01 02 03 04 05 For Elise Ding - Dong Westminster One Ding - Dong It’s Small
BT8031 Features
* 127-note ROM memory
* 2.0V to 5.0V power supply and low power consumption
* RC oscillator on chip
* One shot or level hold mode (mask option)
* Sound range: 2.5 octaves, 2 series
* Tempo: 16 kinds (presto-largo)
* Double sound sources
