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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32.768 KHz Crystal with 20pF Capacitor Load
The 32.768 KHz Crystal (20pF load) is the standard timekeeper crystal used in real-time clocks (RTCs), watches, and microcontrollers that need accurate timekeeping. The frequency 32,768 Hz is exactly 215, which divides evenly down to 1 Hz — making it perfect for counting seconds.
Technical specifications
| Frequency | 32.768 KHz |
|---|---|
| Load capacitance | 20 pF |
| Use | RTC oscillator, timekeeping |
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