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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Electret Microphone Capsule — Omnidirectional, 20Hz–20KHz (3PCS)
The Electret Microphone 20Hz–20KHz Omnidirectional (3PCS) are small, inexpensive mic capsules that pick up sound from all directions. They're the same type of microphone found in phones and headsets — great for voice input, sound detection, clap switches, and ambient noise monitoring with an Arduino or ESP32.
Note: These are raw capsules. You'll need a bias resistor and coupling capacitor, or pair them with an amplifier breakout like the MAX4466 for a ready-to-use analog signal.
Microphone comparison
| Product | Type | Amplified? | Best for |
|---|---|---|---|
| Electret capsule (this) | Electret condenser | No (raw capsule) | DIY builds, custom circuits |
| MAX4466 breakout | Electret + amp | Yes (adjustable gain) | General purpose, sound level |
| MAX9814 breakout | Electret + AGC amp | Yes (auto gain) | Voice recording, varying volumes |
| INMP401 MEMS | MEMS | Yes (built-in) | Compact, digital-ready |
| SPW2430 MEMS | MEMS | Yes (built-in) | Tiny, surface mount |
Technical specifications
| Type | Electret condenser (omnidirectional) |
|---|---|
| Frequency Range | 20 Hz – 20 kHz |
| Quantity | 3 pieces |
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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