Led Audio Spectrum Analyzer Circuit

Led audio spectrum analyzer circuit. Previously i shared 40 led vu meter circuit using audio spectrum analyzer spectrum analyzer circuit 10 channels 32hz 1khz 2khz 4khz 8khz 16khz 64hz 125hz 250hz 500hz on a total of 400 led s spectrum analyzer circuit 12v dc voltage works with all leds illuminated power draws 7 5 amps lm324 op amp used for all integrated control card and vu meter card belonging to the scheme eagle. Better in the sense not just 3 5 channel spectrum analyzer with 5 8 led for each channel that is was common in hi fi audio systems once and still common at least on car stereo. Audio line 1 1 min 2 audio interface 1 speakers 1. As can be seen in the figure the circuit of the proposed audio spectrum analyzer consists of two main stages.

Here is a music spectrum using neopixel rgb led matrix and arm microcontroller. For building better audio spectrum analyzer we need some theoretical idea around fft i s fft library and know how i s hardware works. Flexible 16x16 neopixel rgb led matrix 2 stm32f103rbt6 1 core board switching power supply 5v 40a. The left stage can be witnessed to be an active tone control stage while the right side ic lm3915 stage is a 10 stage dot bar led display stage.