Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
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7-Band Audio Spectrum Analyzer — MSGEQ7 Module
The MSGEQ7 Audio Analyzer splits an audio signal into 7 frequency bands (63 Hz, 160 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.25 kHz, 16 kHz) and outputs the amplitude of each band as an analog voltage. Feed the output into an Arduino or ESP32 to build music visualizers, LED spectrum displays, VU meters, and reactive lighting installations.
What you can build
- LED spectrum analyzer: Drive an LED strip or LED matrix that dances to music
- VU meter: Classic volume-level indicator
- Reactive lighting: Room LEDs that pulse with bass or treble
- Audio research: Analyze frequency content of signals
Technical specifications
| Chip | MSGEQ7 |
|---|---|
| Frequency Bands | 7 (63 Hz – 16 kHz) |
| Output | Analog voltage (DC) per band |
| Interface | Analog output + strobe/reset digital pins |
| Supply Voltage | 5V |
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Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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