Laser Diode Positive Pin (+) → Connect to 5V pin on the Arduino. Laser Diode Negative Pin (-) → Connect to GND on the Arduino. LDR (Light-Dependent Resistor) Connection: LDR Pin 1 → Connect to 5V on ...

The Arduino Laser Security Alarm project aims to create a simple yet effective security system using an Arduino board, a laser module, and a light-dependent resistor (LDR). The system is designed to ...

Put aside all of the projects that use an Arduino to blink a few LEDs or drive one servo motor. [IngGaro]’s latest project uses the full range of features available in this versatile microcontroller ...

[over9k] used his Arduino to set up a laser trip wire. The laser is mounted along side the Arduino, reflects off of a mirror, and shines on a photoresistor that interfaces via a voltage divider. The ...

Alarm systems are complicated affairs. However, if you’re just looking to catch a sandwich thief at work or a cat spilling over all you water bottles, then Make shows you how to build an alarm system ...

It's definitely not the most efficient way to get a clock on your wall, or the cheapest, but if you're looking for a clock that turns heads, looks cool, and is a great starter project if you're ...

Dejan Nedelkovski has built a stylish DIY touchscreen Arduino music player and alarm clock which has been created using a folded piece of sheet metal to provide a minimalist yet clean enclosure to ...