Music Light - Electronic Fooling

STM32 Main Controller: As the main control unit of the entire system, it is responsible for receiving analog signals from the microphone, performing ADC (Analog-to-Digital Converter) conversion, processing the data, and then controlling the operation of the WS2812 LED strip.
Microphone: Used to receive ambient sound signals and convert them into electrical signals.
ADC (Analog-to-Digital Converter): Converts the analog sound signals received by the microphone into digital signals so that the STM32 can process them.
WS2812 LED Strip: Contains a series of programmable RGB LEDs, each with an independent controller that can be controlled via serial communication.



Software:

Data Acquisition: The STM32 receives analog signals from the microphone through the ADC module and converts them into digital signals.
Signal Processing: The received sound signals are processed and amplified.
Controlling the WS2812 LED Strip: Based on the processed sound signal data, the STM32 generates corresponding control signals and sends control commands to the WS2812 LED strip via SPI or similar methods to adjust the brightness and color of each LED.
Lighting Effect Control: Different lighting effect modes are designed based on the intensity and frequency characteristics of the sound signal, such as flashing to music rhythm and color changes mapped from sound intensity. These effects are achieved by controlling the brightness and color of the WS2812 LED strip.



 
I drilled a rectangular hole in front of the LED pads on this motherboard to secure the LED strip. Since the bottom of the strip is soldered vertically, it's relatively fragile. Learning from the first
experience
, this revised version includes a hole for securing it, preventing breakage.
The LED strips were purchased on Taobao; one strip contains eight LEDs.