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.
read tutorial →The Raspberry Pi 3 Model B is the classic credit‑card‑sized Linux computer that helped popularize modern maker culture. With a quad‑core 64‑bit CPU, 1 GB RAM, on‑board Wi‑Fi/Bluetooth, HDMI, USB, and GPIO, it remains a solid platform for education, kiosks, media centers, and lightweight servers.
Choose the Pi 3 Model B when you want a well‑understood, well‑documented Raspberry Pi with huge community support, stable operating system images, and compatibility with a wide range of HATs, cases, and accessories.
| Processor | Broadcom BCM2837, quad‑core Arm Cortex‑A53 64‑bit @ 1.2 GHz |
|---|---|
| Memory | 1 GB LPDDR2 RAM |
| Wireless | 2.4 GHz 802.11b/g/n Wi‑Fi, Bluetooth 4.1, BLE |
| Ethernet | 10/100 Mbps Ethernet port |
| USB | 4 × USB 2.0 ports |
| Display | Full‑size HDMI port; DSI display connector for official LCDs |
| Camera | CSI camera connector for official and third‑party camera modules |
| Storage | microSD card slot for boot and filesystem |
| GPIO | 40‑pin header, 3.3 V logic, standard Raspberry Pi pinout |
| Power input | 5 V DC via micro‑USB (2.5 A recommended) |
| Dimensions | Approx. 85 × 56 mm (classic Raspberry Pi form factor) |
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Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Share what you built. Photos, BOM, what worked, what didn't.
view thread →Symptom + what you tried + clear photo = answers within hours.
view thread →Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →