Roller Robot (just add cats)

I made this when I was working.  I resurrected  it when i discovered that #4 machine screws will

replace the #2 nut that fell out.  The #4 fits through the mount and doesn't need a nut as it threads itself through the plastic in the motor.  So one side has the old #2 with a bolt, the other side has #4 without the nut.

I got an old RC Car with a spare battery and charger (9.6 V NiMh) similar to this:


http://www.radioshack.com/product/index.jsp?productId=24884186


The battery takes up the hidden floor and is held in place with a twist tie.  I did obstacle avoidance with optical distance sensors.  I even had it slow down when it is near a wall.
It turns and avoids walls but will fall down stairs.  The code is here.

http://www.pololu.com/product/136

I used parts from Solarbotics.

https://solarbotics.com/product/23190/

https://solarbotics.com/product/k_cmd/

https://solarbotics.com/product/gm2/

https://solarbotics.com/product/gmb28/

I got the plastic disks from TAP Plastics.  I wonder if the cats remember this guy from when they kittens?