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 →Arduino Nano (ATmega328P) packs classic Arduino power into a breadboard-friendly form factor. Running at 16 MHz with 14 digital I/O (6 PWM) and 8 analog inputs (A0–A7), the Nano is ideal for compact wearables, robots, sensor nodes, and classroom builds in the Philippines. It keeps 5 V logic and the full Arduino library ecosystem, so it works with most sensors, displays, and shields via adapters.
| Microcontroller | ATmega328P (8-bit AVR) @ 16 MHz |
| Operating voltage | 5 V logic |
| Input voltage (VIN) | 7–12 V recommended (allowable 6–20 V) |
| Digital I/O | 14 (D0–D13), 6 PWM (D3, D5, D6, D9, D10, D11) |
| Analog inputs | 8 (A0–A7) — note: A6/A7 are analog-only |
| Flash / SRAM / EEPROM | 32 KB (typ. 2 KB bootloader) / 2 KB / 1 KB |
| Interfaces | UART, I²C, SPI (ICSP header) |
| USB connector | Mini-USB (some variants: Micro-USB) |
| USB-UART chip | FT232 / CH340 / CP2102 (varies by board) |
| Per-pin DC current | 20 mA (observe absolute maximum ratings) |
| Dimensions | ~45 × 18 mm (breadboard-friendly) |
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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 →