555 music lantern controller circuit diagram

The controller is shown in the figure, including acoustic-electrical conversion and amplification circuit, clock pulse generator, counting circuit and control circuit, etc. It controls the four-way colored lights to flash and glow along with the music. The pickup microphone M IC converts the sound of the music into electrical signals, which are added to the four-way analog switch IC3 (CD4066) via VT1 ~ VT4. 555 and RP1, R1, R2, D1, C1, etc. form an astable multivibrator t charge = 0.693 (RP1 + R1) C1 t discharge = 0.693R2C1 T = 0.693 (RP1 + R1 + R2) C1

The oscillation period T of the parameters shown in the figure changes in the range of 0.5 to 5 seconds. The 3-pin output of 555 is added to IC2 as a CP pulse. IC 2 uses CMOS decimal counter/pulse distributor CD4017 . Under the action of clock CP, Q0 (pin 3), Q1 (pin 2), Q2 (pin 4), Q3 (pin 7), and Q4 (pin 10) appear high one after another. level pulse, and Q4 is added to the reset terminal R (pin 15), making the circuit a ring counting circuit. The outputs of Q0~Q3 sequentially strobe the four analog switches of CD4066, so that the music signal is added to VT5, VT6, VT7, and VT8 in sequence, and they are turned on in sequence. SCR1~SCR4 are triggered in turn and turned on. The lantern sockets are powered on and the lanterns are turned on in turn. They are lit up sequentially, and with the melodious music, the colorful lights twinkle and shine.