To that end La Fabrique DIY has built an automated system powered by an Arduino to endlessly toy with the feline in your life.

How to create a simple laser trip wire alarm, taken from theArduino Project Handbook: 25 Practical Projects to Get You Started.

The device also keeps track of temperature and humidity. The entire system can be controlled via a web interface. The Arduino serves a web page that allows the user full control over the alarm.

[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. Th… ...