Here is the steam pumpkin in action and some completed project photos:
Step 1: Gather Materials
I used a Dremel to cut off and reshape metal parts.
Step 2: Carve and Decorate the Pumpkin
First I made a big cut out of the top. I wanted a wedge for the front that was about all that I had planned. I made the back part flat so I could attach a door hinge to the top and bottom parts of the pumpkin.
Next I recreated my goggles using the door knob covers and straps from the purse.
Then added an improvised aviator cap using the flap of the purse.
The ears of "Steamy Wonder" was made from the candle stick holders.
Last, I tore apart the metal lampshade using the Dremel and created the mouth.
Step 3: Add Some Techno Enhancements
In order to make this work, I used a Passive Infrared sensor that I got from Adafruit to detect motion. When the pin goes high it causes the fog machine to turn on. I ran tubing from the fog machine to the ears of the pumpkin. The ioBridge IO-204 controlled the fog machine by monitoring for motion and also setting the color of the BlinkM RGB LEDs. All of the logic was easy to setup.
The fog machine came from Spencers. It's a 400w wireless controlled fog machine. It was easy to control by replacing the buttons with relays. The relays were controlled by the IO-204 and worked as expected, wireless being a nice touch. I don't recommend running the fog machine for very long or without supervision. I will be setting up the pumpkin on trick-o-treat night and some parties.
To change the RGB colors, all you have to do is send a Pulse Width to each color channel. You can mix your own colors. I wanted it to turn a deep red when fog was ready to shoot.
Step 4: Test and Enjoy
If you want to check out this project or other projects that I have been working on, please visit www.iamshadowlord.com.
Here is a video of the steam pumpkin in action: