Arduino Uno Guides

Step-by-step Arduino Uno projects with wiring diagrams, component lists, and ready-to-deploy code.

How to Build a Laser Tripwire Alarm Demo with Arduino

Build a classroom-safe Arduino beam-break alarm demo using a low-power laser, LDR photoresistor, 10k resistor, and piezo buzzer.

Step-by-step Arduino Uno projects with wiring diagrams, component lists, and ready-to-deploy code.

Build a classroom-safe Arduino beam-break alarm demo using a low-power laser, LDR photoresistor, 10k resistor, and piezo buzzer.