SH-808 Holiday Lights ASIC
Source: InternetPublisher:jikai233 Keywords: Application specific integrated circuits lanterns BSP piezoelectric ceramics Updated: 2020/02/18
The holiday lantern controller circuit made with SH-808 integrated circuit is shown in Figure 2-66. The key switch SB1 in the circle is
the program mode selection switch. Each time it is pressed, a program pattern is changed. SB2 is the volume or speed selector switch, which is used
to change the sound volume of the piezoelectric ceramic piece B and the speed of the lantern horse jumping and wave rolling. Transistor VT
is an integrated external audio power amplifier, used to amplify the music signal output by SH-808 to drive the piezoelectric ceramic piece B to produce
sound. Resistor R4 provides AC synchronization signal to SH-808, and capacitor C3 is a high-frequency filter capacitor of the integrated block. R5 is
an external oscillation resistor of the integrated block.
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