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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SparkFun GPS Dead Reckoning Breakout built on the u-blox NEO-M8U. Untethered Dead Reckoning keeps tracking when the GPS signal drops - useful for mobile robots, vehicle tracking, navigation, and outdoor logging.
Onboard accelerometer and gyro help hold position in cities, parking areas, and tunnels. Onboard rechargeable battery cuts hot-start lock time to about 1.5 seconds after backup data is saved. Qwiic connector plus 0.1-inch pins for breadboard use.
Specs
| Module | u-blox NEO-M8U |
| Feature | Untethered Dead Reckoning |
| Constellations | GPS, GLONASS, Galileo, BeiDou |
| Channels | 72 |
| Horizontal Accuracy | About 2.5m |
| Update Rate | Up to 30Hz |
| Sensors | Accelerometer + gyroscope |
| Interfaces | UART and I2C (Qwiic) |
| Protocols | NMEA, UBX, RTCM |
| Voltage | 3.3V VCC and I/O |
| Antenna | Requires U.FL GPS/GNSS antenna |
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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