Simple sound control music color light circuit diagram production (video assembly and demonstration effect)
This circuit controls the LED lighting by sound. The microphone MIC sends the collected sound signal to the base of V1 through C1, after being amplified by V1, and then sent to the CP end of IC2 through C2 to drive LED1 to LED9 to light up in turn. As the sound changes, the pulse frequency sent to the CP terminal is also significantly different. When the sound continues, the frequency of LED lighting is also high, sometimes flickering chases, and sometimes almost all lighting effects (this is just the visual persistence of human eyes). The illusion is that only 1 LED is on at the same time).
The output terminal of Q9 of IC2 of this circuit is connected to terminal RST through C3, and RST is grounded through resistor R4. It can also be regarded as a 9-ary circuit.
Many music color lamp controller circuits have a large amount of audio signal amplification and use three to four transistors, which is inconvenient for circuit adjustment and difficult for beginners to assemble successfully. For this reason, I used an audio amplifier integrated circuit lm386 to assemble a music lantern controller. The peripheral circuit is very simple and does not require debugging. Its cost is less than five yuan and it is very sensitive. The circuit is as shown in the figure, and the transformer is a portable radio output transformer. htd is a piezoelectric ceramic sheet with a diameter of 27. This circuit can drive incandescent bulbs below 150 watts. If you want to increase the power of the bulb, you only need to change the high-current thyristor. The controller sensitivity can adjust the distance between the piezoelectric film and the sound source. The controller can also sound-controlled electric fans.
The circuit of the color light controller is as shown in the figure below, r1, r2, d and c form a resistance step-down half-wave rectifier circuit, outputting about 3v direct current for the control loop of the scr. Piezoelectric ceramic chip htd acts as an acoustic-electric transducer, usually adjust w to make the bg collector output low level, scr is turned off, and the color light is off. When the htd receives the sound wave signal, the bg collector level rises, and the scr is turned on, so the colored lights can flash and glow with the rhythm of the music broadcast by the indoor radio.
Connecting to the connection shown in the figure, the audio voltage can be triggered through the transformer after the audio voltage is divided, so that the light will alternately emit light according to the strength of the music signal. When in use, connect both ends of the potentiometer directly to the two ends of the radio speaker.
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