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Braveit1
09-21-2009, 05:18 PM
I have found a way to make cheep, easy 2 servo talking skulls or other motion controlled props. The Gemmy skull I purched comes in several models. They have one that the eyes move and the mouth talks. I couldn't find that one. A second model the eyes are fixed and the mouth moves. (I bought a broken one at the end of last year.) The third model comes with leds for eyes and the same moving mouth. I think they also make a pirate version and a lantern version. Basically I gutted the broken skull I purchased of all the electronic goods. I removed the plastic clips that hold the eyes in a fixed position. Added hot glue accross that portion so that the eyes don't fall out. (Work the eyes back and forth while the glue is hot so that it doesn't stick to the eyeballs.) I attached a paper clip to the two eyes and in the middle placed a servo arm. Then I hot glued a mini 9g servo between the eyes. I glued another mini 9g servo above the eyes were the old motor was. Ran another paper clip between that servo arm and the lever for the jaw. Keeping the jaw spring in place helps. Both servos were plugged into a pololu mini serial servo controller purchased from www.pololu.com. Set the servo to Mini SSC mode and add the plug-in to Vixen. If you don't see the plugin download it from the Vixen site and place it in the plug-in directory. I used the wave form plug in to conver the audio to dim over one channel that I have set to the jaw. I had to invert the result because of the way I position the servo arm. Add some eye movement. Repeat for three more skulls and now you have your own bone-tones!!! Really didn't take me more than a few hours for the prototype. I have to order more servos to finish the rest of mine but here is a short video.
I will post more detailed photos later. I'm also going to add led eyes to be controlled by my ren24 as soon as I figure out how I'm going to wire a single set of two leds. Anyone know the best place to connect to the 3.3 version of a ren for DC if it is also being used for A/C? I'm thinking of using some of the power bricks from some old cell phones. I have plenty of those lying around.

http://www.youtube.com/watch?v=2S-9-LqyMpI&feature=channel_page

Braveit1
09-21-2009, 09:21 PM
Here are pictures of three types of the Gemmy skulls I have, and the inner guts servo mod I made.

MBrynildsen
09-23-2009, 07:55 AM
Looks cool!

Jeff Millard
10-05-2009, 06:28 AM
Then I hot glued a mini 9g servo between the eyes. I glued another mini 9g servo above the eyes were the old motor was.

Can you provide links to the mini 9gs? I'm just looking into this, and have about 20 of those skulls.... Any help would be appreciated.
Jeff

kostyun
10-05-2009, 01:02 PM
A good place for servo's on the cheap is http://www.servocity.com/

rca
10-05-2009, 01:33 PM
If you don't mind waiting, this is where I buy all my 9g servos for my RC hobby. They ship from Hong Kong.

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=662&Product_Name=HXT900_9g_/_1.6kg_/_.12sec_Micro_Servo

They sometimes stock them in their US warehouse for a slightly higher cost.

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8306&Product_Name=HXT900_9g_/_1.6kg_/_.12sec_Servo_(USA_Warehouse)

Ron

Braveit1
10-06-2009, 11:37 AM
I bought the servos from http://www.r2hobbies.com. they also ship from Hong Kong.

Braveit1
10-06-2009, 11:38 AM
I have been converting the skull without eyes to one with eyes using the Halloween Ping pong balls they sell at Spirit. I will post progress later.
Also, the controler I used was from http://www.pololu.com/catalog/product/727

Macrosill
10-08-2009, 11:21 AM
I have been converting the skull without eyes to one with eyes using the Halloween Ping pong balls they sell at Spirit. I will post progress later.
Also, the controler I used was from http://www.pololu.com/catalog/product/727

I saw those at a Spirit store yesterday. I was wondering if they could be used for eyes in a skull. I guess I will have to go back and get some now.

BTW, did you see the Michael Meyers prop? I got goose bumps just watching it in the store, during the day. Imagine it at night. His eyes moved left and right, his head turned left and right and he had a knife in his hand and the arm went up and down in a stabbing motion. 250.00 was kind of pricey. I would like to make one just like it, minus the stabbing arm part. This is what got me thinking about the "beer pong" eyeballs.

Braveit1
10-12-2009, 11:12 AM
The ping pong eye balls are slightly smaller than real ping pong balls. They are almost the perfect size. I did have to drill out the black part of the skull to fit the balls. Still working on a way to hold these in. I have another Halloween project I've been working on for a friends party so I haven't worked on this all week. Hope to get back on it soon.