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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Active Buzzer 3V/5V — 5-Piece Pack
The Active Buzzer 3V/5V (5PCS) is the simplest way to add sound to your project. An active buzzer contains a built-in oscillator, so you just apply DC voltage and it beeps — no frequency generation needed from your microcontroller. Ideal for alarms, button feedback, timer alerts, and notification sounds.
Active vs passive buzzers
| Type | How it works | Pros | Cons |
|---|---|---|---|
| Active (this) | Built-in oscillator — apply voltage and it beeps | Simple, one fixed tone | Can't change frequency |
| Passive / Piezo | Needs external frequency signal (PWM) | Play melodies, variable tones | Requires PWM from MCU |
Technical specifications
| Type | Active (built-in oscillator) |
|---|---|
| Voltage | 3–5V DC |
| Quantity | 5 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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