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Spectrum

2 boards

KiCad boards from 2 GitHub repositories tagged “spectrum”, the most starred first; open any of them in PCBKit.

2 layers63.5 × 82.6 mm
Matrix
HorstBaerbel/HubAlyzer
A spectrum analyzer display for HUB75 RGB LED panels and I2S microphones
12 parts17MIT
2 layers74.9 × 100.3 mm
Spectrum analyzer
JadenS180/spectrum-analyzer
ESP32-based real-time audio spectrum analyzer with custom PCB design. Features INMP441 I2S microphone, SSD1306 OLED display, FFT processing, and real-time WiFi streaming to a browser-based visualizer via WebSockets.
11 parts2MIT