Edit: I would recommend printing this version that turns the screw vertical and cleans up the stl files:
http://www.thingiverse.com/thing:2303403
Thanks dnewman!

30 to 1 worm drive reduction gears. 3 parts. Could be used in a clock in addition with a 2 to 1 reduction due to ratio. The worm wheel is helical.

https://youtu.be/VE7kmcveCOQ

The mechanical laser show is a device that projects a pattern by quickly moving a laser. It's
hand powered, 3d printed, open source, and free to print.

For more information and shots of it in motion, see this video:

https://youtu.be/_dtBUiaAqRE

Hackaday.io post with more info: https://hackaday.io/project/25447-mechanical-laser-show
Cam profile code: https://github.com/EvanStanford/cams

This is the enhancement of Dancing Bob. Hoping that it will be more funs to play and built. It operates in three modes - auto piloting with ultrasonic distance sensor to avoid obstacle in front , Android phone controlling and dancing (as Dancing Bob does). See the video demos for how it works.

Video Demos:
https://youtu.be/v6fhp-PBAvM
https://youtu.be/i7kbZWQ6gPA
https://youtu.be/QIgRliw24Jo
https://youtu.be/UVAYuXhsoQM

Electronics:
1) this Arduino board or others you prefer.
2) Two 18650 Lithium-ion battery in parallel as the board with voltage step-up regulator.
3) 4 x low cost Tower Pro 9g servo.
4) Ultrasonic distance sensor HC-SR04, this is optional if you don't want obstacle dectection.
5) SPP-C Bluetooth UART or equivalent for Andriod phone control, this is optional if you don't play with Android phone.

Hardware:
1) Dupoint wires
2) M2x6 and M2x4 tapping screws
3) Battery metallic spring (optional if you use battery pack likes we do)

Software:
1) Arduino code on githup.
2) Android app on Google Play (optional).

Wring:
Connections to GPIO pins are as following -

   ---------------
YR|               | YL
   ---------------
     |||    |||
     |||    |||           
     |o|    |o|  
 RR -----  ----- RL
    -----  ----- 

1) D3 to YR servo
2) D4 to RR servo
2) D5 to RL servo
3) D6 to YL servo
2) D8 to HC SR04 trigger pin
3) D9 to HC SR04 echo pin
4) HC SR04 power input to the board 5V output and GND pins
5) D11 bt state
6) D12 dancing mode state
6) Bluetooth UART module to the board's Bluetooth connector

All servos initial angles must set to 90°.

How to play:
D11 and D12 are used to select the playing mode. When D11 and D12 are low which are connected to GND. Armor bob is on auto piloting mode. In this mode, walking direction are randomly changed in every 5 sec. In walking forward, the ultrasonic distance sensor detects obstacle at the front and will avoid it (back off and turn away).

When D12 is high state (connected to 3.3V pin), it is on dancing mode as playing likes Dancing Bob

When D11 is high state, it is controlled by the Android phone, the Bluetooth UART must be installed. To control by the App, firstly pair the Bluetooth UART with your Android phone. On app screen tap 'Bluetooth' to select it, then tap the arrow buttons to control it.

Chip-E was not strong enough so i gave him beefy arms and a 6 pack
now his looks alone can defeat

This is a Chip-E Remix. This takes Chip-E way back to the dinosaurs! With the given body armor Chip-E will be able to survive the dangers of life. You may have to resize the part to get it to print correctly.

If you ever wonder how to impress your robotics teacher, mom and dad or your friends, this is the perfect robot. Its name is Chip-E The Quadruped. It walks on four legs. It previously was a biped which was later converted into a quadruped! It will impress people as it looks complicated yet is very simple to build. You should have a working quadruped in not more than 3 hours after print.

'Clockwerk' is a wall hanging kinetic sculpture of a 3-axis tourbillon escapement, and is the world's first 3D printed multiaxis tourbillon. The mechanism is heavily inspired by Vianney Halter's wonderful "Deep Space Tourbillon" watch, but adapted for the scale and materials of 3D printing. See the final mechanism in action here.

3-axis tourbillons are beautiful to see in motion, but are some of the most expensive and rare watch components in the world. Watches containing them command prices in the hundreds of thousands USD, and have production volumes in the single digits. What better way to bring this mechanism to the masses than 3D printing?

Now you can have watchmaking's rarest escapement hanging on your wall!

Clockwerk is made of 99 parts: 34 printed parts, 8 ball bearings, 3 metal shafts, 2 barbell plates, 1 meter of fishing line, and 51 screws.

The model shown here is printed such that each axis is an alternating color for ease of understanding the axis of rotation. The central blue part rotates within the white cage, which rotates within the blue U which rotates within the white bowl.

Note that this is a bit tough to print and assemble, and is not a beginner project.

1.1 Revision Notes:

• Updated Part Orientations
• Added Bowl-Top_2 component. I incorrectly thought it was identical to the previous "Bowl" component, but it's actually slightly different. If you previously printed 2X of the bowl, you'll need to replace one of those with one of these (sorry).

ice cream protection

Headphone holder for a desk or shelf.
It has hook for cable, and hole for mini-jack.
M12 screw with increased tolerance for easy assemble.
Clamping thickness varies from 20 mm to 32 mm.

There's already tons of Pen Holders on Thingiverse, but I wanted to have one with some organic touch to it.

Thanks Thingiverse for featuring it on August 15, 2013!

Tape is the tongue.
Remix From:
http://www.thingiverse.com/thing:308335
http://www.thingiverse.com/thing:14531
More Photos & Process:
http://mingshiuan.blogspot.tw/2014/05/3dt-rex-tape-dispenser.html
Infill:10%
Number of Shells:2
Layer Height:0.2mm

HI EVERYBODY
THIS IS MY HALF SCALE K2S0. IT IS SPLIT UP TO MAKE PRINTING AS EASY AS POSSIBLE WITHOUT SUPPORTS. IT IS HOLLOW SO IDEAL TO ADD SOME LIGHTING BEHIND THE EYES.
HAPPY PRINTING!

This is a Retro Chip-E, who does not want to have the old school gadgets that were really coo back in those days.
This Remix was inspired in those portable consoles that gave us hours and hours of fun. I'm sure that many of us remember those pals.

New abilities:
Cartridge Slot
It can cause many tears because of the nostalgia that it produces.
You can blow the cartridge as many times as you want just to remember that feeling.
Abilitie to recover your geek power bar to 100%