DIY Sound Control LED Music Spectrum Electronic Kit Column Audio Display PCB Soldering Practice Kit LM358 LM339
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DIY Sound Control LED Music Spectrum Electronic Kit Column Audio Display PCB Soldering Practice Kit LM358 LM339

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Key item features

  • 10-segment crystal column spectrum light, through microphone induction, LED light fluctuates with the volume of music, especially at night, full of dynamic feeling. Long-term animation, multiple audio effects, high sensitivity.
  • In the circuit, the adjustable resistor RP1 is used to adjust the amplification of U1A, that is, to adjust the sensitivity of the volume column. The capacitor C2 and R3 form a delay circuit, which can form a slow descent pattern on the volume column, making the volume column look more intuitive.
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