[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 ...

Sometimes security doesn’t need to be overly complex to be effective. Instructables user [1234itouch] recently built a simple laser tripwire alarm that can be mounted virtually anywhere, complete with ...

If you have ever wanted to create your very own laser tripwire grid like in the movies to protect your valuables possessions, buildings or outhouses. You might be interested in a new Arduino ...

A new Arduino project has been posted to the awesome Instructables website this week providing details on how you can create your very own Arduino laser pinball machine. Sound exciting? If you are ...

In this fun project an ultrasonic distance sensor is used to detect a “target” (i.e., a person, a cat, a burglar, etc.). The Arduino illuminates (blasts) the target using an inexpensive laser diode ...

In this project, we create a joystick-controlled laser by connecting two servos to a joystick and using this setup as a pan-and-tilt controller for a laser pointer. The following is excerpted from the ...

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 ...