Instructables
Picture of CatBot: Automated Cat Laser
The CatBot is an autonomous laser toy for your cat. You may say "But Joe, isn't the laser pointer the best toy for the lazy cat owner?" I'd have to say no, the CatBot takes one step further.

Using two servos, an Arduino and a cheap $3 laser you can provide your cat with endless fun.

Video of the CatBot in all of it's Laser Zeppelin glory  below:
 
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Step 1: The Problem

Picture of The Problem
IMG_5119.JPG
I was buying pet food and saw a $3 laser from PetCo. I thought the cat might like it. I was wrong. The cat became obsessed. Constantly grabbing the toy off of the coffee table. But she only wants to play for 1 minute then sit and stare at it. So you think, OK I guess she is bored. You put it down....

And she's back pawing at it.

The CatBot is the solution.

Step 2: Parts

Picture of Parts
For this I used the following:
Arduino Uno
Hillman Hobby Parts (found @ Lowes in the screws/nuts/bolts area)
2 Servos
Zip Ties
$3 Laser cat toy.

Step 3: Disassemble the Laser

Picture of Disassemble the Laser
The laser pops open with a screw driver. You can see it used 2x1.5v batteries. But it actually runs better at 4.5v.

Step 4: Cut the Laser

Picture of Cut the Laser
The laser had to be cut up to fit on the servo arm. I drilled a hole in the center so I could mount it to the servo arm as well.

Step 5: Build the Servo Tilt/Pan

Picture of Build the Servo Tilt/Pan
I used a hodgepodge of these cool mechano/erector set pieces from Hillman. They can be found in the screw/small parts drawers at Lowes.

Step 6: Wire up the Arduino

Picture of Wire up the Arduino
For the Arduino wiring, attach pins 8 & 9 to the servos.
Attach the laser to 5v, but 470 ohm resistor inline before the laser.

Step 7: Load the Code

Picture of Load the Code
Use the code in the attached file to program the Arduino.

Step 8: Sit back and enjoy

Picture of Sit back and enjoy
Now that it is assembled and done watch it go...