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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WTV020 audio playback module. Plays AD4-format files off a MicroSD card, controlled from an Arduino or any microcontroller. Add sound effects, voice alerts, or music to a project.
Drive an 8-ohm speaker straight off SPK+/SPK-, or feed the AUDIO-L DAC output into an amp for cleaner sound. Two-wire serial picks tracks and handles play/pause and volume. Runs at 3.3V, so use a level shifter on a 5V Uno.
Specs
| Chip | WTV020 |
| Storage | MicroSD/TF up to 1GB |
| Format | AD4 |
| Audio out | 16-bit DAC/PWM, direct 8-ohm speaker or AUDIO-L to amp |
| Voltage | 2.7-3.5V DC (3.3V recommended) |
| Control | Two-wire serial + playback pins |
Signal lines aren't 5V-tolerant. Use a level shifter with an Uno or other 5V board.
FAQ
Will this ship from Manila?
Yes — all stock ships from our Quezon City warehouse. Order before 4 PM weekdays for same-day cutoff via J&T or LBC.
Do you ship nationwide?
Yes. Metro Manila usually arrives next-day; provincial 1–3 working days.
Can I get this on a school PO or class order?
Yes — we accept Purchase Orders from accredited schools and universities. Contact us with your PO details and we'll process it.
Is this compatible with Arduino, ESP32, or Raspberry Pi?
Most parts work with common maker boards — check the description for specific pinout / voltage notes. If you're unsure, send us a message before ordering.
What's your return policy?
7-day inspection window for DOA units. Email proof of issue and we'll ship a replacement or refund. Used / installed parts are not returnable unless faulty.
Do you offer technical support?
Yes — questions land on our forum or via email, weekday or weekend. We've actually wired up most of what we sell.
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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