由 admin The VFD music spectrum screen is a classical vacuumDisplay device. 25 frequency bands distributed horizontally and verticallyDisplay the frequency gradient of voltage, using silicon microphone and STM32F103 processor.
According to the different screens used, they are divided into two models: VFD2515 and VFD2517, as shown in the figure：Same appearance, only different display area.The upper part is VFD2517, and the lower part is VFD2515
and VFD2515 also has a triangular prism shell version
