Have you ever wanted a Gothic Cathedral of your very own?

Are you intimidated by the centuries long construction schedule, and the punishing job requirements of being a European Bishop during the Dark Ages?

Then We Have a Thing For YOU!

The Gothic Cathedral Play Set!

Prodos is the second prototype robot from Project Biped (http://www.projectbiped.com) whose goal is to create an open source 3D printed dynamically balancing walking robot. Prodos was designed to demonstrate how to coordinate simple limb chain actuation using a microcontroller. It has 8 degrees of freedom (joints) and can perform a simple walking action. The servos used were selected for economy and aren't powerful enough to bear the robot's own weight, so Prodos must be externally supported while it is executing its walking action. See a video of Prodos in action at projectbiped.com/prototypes/prodos/walking-analysis

Prodos has the following features:
*Uses an Arduino Duemilanove microcontroller
*User interface via OLED display and 4 button panel
*8 degrees of freedom
*Detailed assembly instructions

A calling card with working planetary gears. Astound your friends, frustrate your nemisii.

(Update: I've moved the gears slightly to the right, reducing the number of cut parts to assemble.)

This is a business card that shoots US pennies. It has a little magazine that pops up and allows you to load up to 10 pennies. Then you can just pull back the slide and release to shoot a penny, and repeat until all the pennies are gone.

A video of the card in action - youtube.com/watch?v=5KNZZ9qDJtQ

A hexapod with servo joints. This design is quite big and needs strong servos but looks really cool ^^.

I used 20 HD-2213MG Servos (http://www.servodatabase.com/servo/power-hd/hd-2213mg) . If you use other servos you need to modify the embeddings for the servos and servo horns. You may make the upper and lower legs shorter to get shorter leverage.

Finally the parts get assembled with M2 thread rod and nuts.