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 HLK-PM01 is a isolated power supply module with input range of 100 volt to 240 volt AC and output of DC 5 volt and power rating of 2 watt. Its ultra compact size makes it perfect to use in places where size is a constraint. It is a compact PCB mountable plastic enclosed power supply module. It replaces lots of parts from the traditional power supply like diodes, voltage regulator, transformer. There are many advantage of these modules, such as: Global input voltage range, low temperature rise, low power, high efficiency, high reliability, high security isolation, etc. It has been widely used in smart home, automation and control, communications equipment, instrumentation And other industries, when applied to electromagnetic compatibility relatively harsh environment.
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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 →