Use LM386 to make two-color voice-controlled music lanterns

The festival light controller circuit made with SK-12P integrated circuit
is shown in Figure 2-88. VDI, VD2, Rl, and C2 form a resistor step-down voltage stabilizing rectifier circuit, which outputs about 5v DC voltage for
the integrated block. Since pin 1 of the trigger terminal of the chip is connected to pin 12 at high level, after the power is turned on, the seven drive output
terminals, namely pins 2, 3, 4, 5, 7, 8, and 9, will automatically output high level in a cycle according to the program. , the seven groups of colored lanterns are illuminated in sequence in six pattern
control modes . With the continuous conversion of the six pattern control modes , the flashing patterns of the lanterns continue to alternate,
producing a magical dreamy effect.