We can use them to cut things, create laser light shows, and also as a rangefinder. [Ignas] wrote in to tell us about [Berryjam’s] AMAZING write-up on creating an Arduino based laser rangefinder.

The laser tower is glued to an Arduino board and attached to a laser module, all enclosed in an old Altoids box. The tower is composed of two SG90 micro servos, attached to a pan / tilt camera ...

There are approximately a zillion DIY laser engraver tutorials on the Web, but of all the homemade builds we've come across, this one from Instructables user MichielD99 is definitely one of the best.

Does it just stay there and do random things? Nope, of course not! [Guido] built it with a unique control box, two Arduino 2560’s and an Xbee to communicate between them.

Makers, Arduino and electronics enthusiasts that have wanted to create a laser sky effect generator, may be interested in this new DIY tutorial which ...

Laser cutters are great DIY tools, but they're pretty expensive. If you'd prefer to build your own, Instructables user SilverJimny shows you how using an Arduino.

You'll need an Arduino, of course, and you'll also need a pair of laser pointers, a few servos and motors to make the lasers move as time passes, and of course, the IKEA BLANDA salad bowl ...

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