http://www.halltvseries.com/tv-projector-plans/
How can I assemble a working mechanical powered projector?
I wasn’t sure how else to phrase the question above. I’m currently working on a sculpture project that takes found objects TV casings , Bicycles, lights, etc, and combines them together to make a larger complex machine. At the moment the plan is to have a large tv case that you sit behind , using the bike pedals you turn the film reels on the inside of the case. I already know how to provide the musical soundtrack with a music box, the thing is I know that film needs to be projected at a constant speed, 22 fps I believe, I was wondering if anyone knew how or of someone who would know how to set this up so that the film wouldn’t tear before the correct speed is achieved or if this idea is even possible.
The film is not going to tear from to low, or to high a speed if it is no being stretched in the process. The tensile strength of the film has it’s limits, this is true. That said, the reels should be supplying the motion for the film, with no stretching of the film as the reels move to unwind it, and then rewind it. About the best thing to do, short of figuring out how to make a mechanical system to fit your needs would be to find an old Bell and Howell projector, put a small generator on your contraption, and use the projector to move the film. Short of that, you need a supply reel, which you say that you have as well as the take up reel, that move together at the same speed, as well as a toothed gear to fit into the small holes on the side of the film to move the film at a constant speed through the lens assembly. The reels can’t turn to fast, or to slow such as to cause drag, or tension on the film as it enters and leaves the lens assembly. See if you can find a projector as I have named, or a similar one and study how it works. This might help you with your project. Schools, and colleges would be a good place to look for such projectors, as well as on Ebay.
Homemade Video Projector
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The Wheel $1.99 … |
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The Wheel [HD] $2.99 … |
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The Telepathy Beam $1.99 … |
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