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 Pico 2 W is the wireless upgrade to the Pico 2 family—built around the RP2350 microcontroller and designed for fast IoT prototyping. You get a compact 40-pin DIP-style board, 2.4GHz WiFi (802.11n) + Bluetooth 5.2, and the classic “drag-and-drop” UF2 programming workflow over USB.
Wireless is handled by an on-board Infineon CYW43439 interface connected via SPI to the RP2350.
| MCU | Raspberry Pi RP2350 (Pico 2 W series) |
|---|---|
| CPU | Dual Cortex-M33 or RISC-V Hazard3 cores, up to 150MHz |
| Memory | 520KB on-chip SRAM |
| Flash | 4MB on-board flash |
| Wireless | 2.4GHz 802.11n WiFi + Bluetooth 5.2 (on-board antenna) |
| GPIO | 26 multi-function 3.3V GPIO (23 digital-only, 3 ADC-capable) |
| USB | Micro USB B for power + data + reprogramming (UF2 mass storage) |
| Form factor | 21mm × 51mm DIP-style board (40-pin, 0.1" pitch) + castellations |
| Power input | VSYS input range ~1.8V to 5.5V (on-board buck-boost SMPS to 3.3V) |
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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 →