Let's Make Robots!
Crystal_Ball.zip138.74 KB

The Crystal Ball of Horror was my entry into the http://www.tinyclr.com/ Halloween contest.

UPDATE: 11/11-2010

I got second place in the contest http://www.tinyclr.com/ :-) and I'm very happy with that. This gave me a coupon for $150 so I just ordered two more FEZ Panda Tinkerer Kits and a SD card extension board.

I wanted to make something that wouldn’t scare the kids so much that they would keep me up at night, but still be a good Halloween prop.
Coming from Norway, Halloween is relative new to us and not many having any props outside the house.

I had this mounted on outside on Halloween and it gave quit a few children a fright. :-)

I started out buying a plastic light fixture and built a box around that to contain the electronics.
The box had to hold;

  • FEZ Domino as I wanted to use the SD card and audio playback
  • PIR sensor to trigger the animation (concealed behind the keyhole)
  • A circuit board to hold transistors controlling the RGBs
  • $5,- amplifier
  • Speaker
  • Servo, RGBs, an ultra bright LED and other stuff


The plan was just to superimpose a pumpkin head but that wasn’t all that cool so I came up with the idea of making an eye instead and it came out pretty good.

Some more pictures from the build

The $5,- amplifier


The eye is a clip art iris printed out on overhead film and glued onto a piece of Plexiglas.

The programming was easy with NETMF (I do hope more of you people would check it out).

I probably won’t win the competition but still it was a fun project to do.

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nuumio's picture

Nice work again Geir and thanks for sharing this.


GroG's picture

Excellent design, beautifully executed.  

PaulJD's picture
You get a double-whammy with the simultaneous scream and visual affect. I jumped back while watching it on my screen...very affective. Nice job!!
rik's picture

The projected iris is truly original and beautifully executed.

fritsl's picture

Wow, specially that projector of the eye works REALLY well. What an idea for a robot eye!! Cool. And in general; Impressive "artwork", nice!