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Makers and Making: sideways carousel slide projector?
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Nov 5th 2009
I am trying to come up with a way to place a kodak carousel slide projector on its side and still have it function properly.... the problem is that, when conventionally oriented, the sides are gravity fed from the carousel into the 'chute' which light passes through allowing for projection. When the projector is placed on its side, the slides are no longer able to fall from the carousel into the chute.
Any ideas for a relatively simple way of feeding/ pushing the slides into place?
The projector has an automatic function which allows it to continuously project and advance to the next slide.
I was initially thinking of a wheel which rides on the carousel and a spring loaded pin which forces the slide down. The problem is getting the pin to retract in order for the carousel to advance.
Thanks for any help
Any ideas for a relatively simple way of feeding/ pushing the slides into place?
The projector has an automatic function which allows it to continuously project and advance to the next slide.
I was initially thinking of a wheel which rides on the carousel and a spring loaded pin which forces the slide down. The problem is getting the pin to retract in order for the carousel to advance.
Thanks for any help
Nov 6th 2009
John, Thanks, but it is necessary for the installation to reorient the projector itself...
Nov 6th 2009
okay...
Many moons ago I used to repair Kodak slide projectors (as well as gobs of other AV equipment). I can see how this could be done, but it would be a fairly complex hack.
As you said you'd need a plunger to push the slide down into the projection slot. Probably the simplest way to do this would be to use a pneumatic cylinder, but I'm guessing that you don't have compressed air handy. Short of that, you'll need some sort of motor driven linear actuator with a throw of about 4 inches. I can't think of anything that has such an animal, so you'd probably have to build it from scratch. In essence, motor connected to a threaded rod, a nut rides back and forth on the rod, and the nut is connected to your actuator. I can be more detailed if you want.
Once you have the mechanics worked out, you are going to need to fire the thing. Best bet I can think of is to use a little beam-break detector (LED and Photo Transistor) situated so that the little index pins sticking out the bottom of the slide tray break the beam as it's advanced. That of course would require some modification of the projector itself to let you get the sensor under there.
One other issue... If I remember correctly, if you turn one of those slide projectors up on it's side, when the tray reaches the -0- slot, the tray would fall off of the projector.
John
Many moons ago I used to repair Kodak slide projectors (as well as gobs of other AV equipment). I can see how this could be done, but it would be a fairly complex hack.
As you said you'd need a plunger to push the slide down into the projection slot. Probably the simplest way to do this would be to use a pneumatic cylinder, but I'm guessing that you don't have compressed air handy. Short of that, you'll need some sort of motor driven linear actuator with a throw of about 4 inches. I can't think of anything that has such an animal, so you'd probably have to build it from scratch. In essence, motor connected to a threaded rod, a nut rides back and forth on the rod, and the nut is connected to your actuator. I can be more detailed if you want.
Once you have the mechanics worked out, you are going to need to fire the thing. Best bet I can think of is to use a little beam-break detector (LED and Photo Transistor) situated so that the little index pins sticking out the bottom of the slide tray break the beam as it's advanced. That of course would require some modification of the projector itself to let you get the sensor under there.
One other issue... If I remember correctly, if you turn one of those slide projectors up on it's side, when the tray reaches the -0- slot, the tray would fall off of the projector.
John
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