GEEKTONE VFD2515 Music Spectrum Display

The GEEKTONE VFD2515 is a sound-activated vacuum fluorescent music spectrum display. It samples line-level or microphone audio and renders a 17-band VFD spectrum in real time. This short demo shows the unit in various lighting conditions — the VFD green phosphor glow is clearly visible even in bright daylight. The board runs from a single 5-12V supply and accepts both line-in and built-in microphone input. Sensitivity and display mode are configurable via the on-board push buttons.