ESP32 WS2812B Music Spectrum Analyzer

The project is described
as being constructed from four 100×60 PCBs. The original author's size was too large, making free board fabrication impossible, so a smaller size was adopted.
Separating the control board from the LED board makes soldering easier and allows for flexible selection of the number of LED boards (note the power supply wattage!!!).
 
Bilibili demo video: https://www.bilibili.com/video/BV1Xb421e7Yw/?share_source=copy_web
 
Do not purchase components strictly according to the BOM; cheaper LEDs can be found on Taobao (it's recommended to buy a few extra as spares, but not too many). Make sure you buy the correct microphone model. When soldering LEDs
on
the front
, pay attention to the silkscreen markings to avoid soldering them backwards. Connect the signals of each board
on the back
with wires. I didn't solder capacitors, but it didn't affect usage. Pay attention to the positive and negative terminals of the power cables; don't reverse them. When soldering the microphone, press it down to squeeze out excess solder.
Fix the control board to the casing (do not use hot glue, as it will melt due to heat).
Plug the data cable into this casing.
Website link for firmware flashing: Chinese firmware (the flashing process is the same as WLED, so I won't go into detail here; there are tutorials on Bilibili).
WLED official link. After
WLED configuration
and flashing, test if it works before assembling the LED board, grating, and diffuser film. (
Image showing the effect).