RE: [Cameramakers] Re: Cold Light Head Construction
Steve, I think the Zaon VI controller measures the light output and then adjusts the time to compensate. I don't think the light is adjusted. Can't help you much on the necessary electronics to drive a flourescent lamp. -Original Message- From: Steve Goldstein [mailto:[EMAIL PROTECTED]] Sent: Monday, February 04, 2002 11:45 AM To: [EMAIL PROTECTED] Subject: [Cameramakers] Re: Cold Light Head Construction On a related front... Does anyone know where I can find out the principles of how to (electronically) control a cold light tube? I'd like to build something like the Zone VI controller for a 5x7 cold light head I got a few months ago (no, it's not for sale). I'm an electrical engineer so schematics or even a reasonably accurate description would suffice. I realize the system works by monitoring light output and comparing that to a reference voltage, what I really need to know is how to actually drive the lamp. Thanks. steve ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
RE: [Cameramakers] Re: Cold Light Head Construction
Dave, The Zone VI definitely adjusts the light intensity. You can see it by turning the knob, it's very obvious. I was just using mine the other day. steve ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
RE: [Cameramakers] Re: Cold Light Head Construction
On Mon, 4 Feb 2002, Dave Schneider wrote: I think the Zaon VI controller measures the light output and then adjusts the time to compensate. I don't think the light is adjusted. Can't help you much on the necessary electronics to drive a flourescent lamp. Go to the Alternative Process subsection of the Theory and Techniques page on the RMP site http://rmp.opusis.com/theory.html. Here you will find a link titled Flourescent Lamps, Ballasts, and Fixtures - Theory of Operation, Troubleshooting and Repair. That may be of some help. - Wayde ([EMAIL PROTECTED]) ISART 2002 International Symposium on Advanced Radio Technologies http://www.its.bldrdoc.gov/meetings/art/index.html ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Re: Cold Light Head Construction
Hi Dave I think if you could find a neon light company or some one who makes neon lights you can find what kind of transformers or used in the Zone VI as I believe that is what the light source is in their cold light head. I know there not very complex as I have been inside them to see how they were made. Ron www.ronbakerphotography.com - Original Message - From: Dave Schneider [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, February 04, 2002 11:55 AM Subject: RE: [Cameramakers] Re: Cold Light Head Construction Steve, I think the Zaon VI controller measures the light output and then adjusts the time to compensate. I don't think the light is adjusted. Can't help you much on the necessary electronics to drive a flourescent lamp. -Original Message- From: Steve Goldstein [mailto:[EMAIL PROTECTED]] Sent: Monday, February 04, 2002 11:45 AM To: [EMAIL PROTECTED] Subject: [Cameramakers] Re: Cold Light Head Construction On a related front... Does anyone know where I can find out the principles of how to (electronically) control a cold light tube? I'd like to build something like the Zone VI controller for a 5x7 cold light head I got a few months ago (no, it's not for sale). I'm an electrical engineer so schematics or even a reasonably accurate description would suffice. I realize the system works by monitoring light output and comparing that to a reference voltage, what I really need to know is how to actually drive the lamp. Thanks. steve ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Re: Cold Light Head Construction
At 12:27 PM 2/4/2002 EST, you wrote: i actually posted a similar question to the Large Format Mailing list a couple of months ago. For 4x5, which as my interest at the time, the consensus was the quickest route would be to buy a second hand Aristo source or the equivalent. For larger formats, where second hand equipment is not so common, DYI construction may be far more cost effective. The Omegalite, I understand, is a simple (household type) ring fluorescent tube with a reflector. A really interesting suggestion posted in response to my query was the use of a styrofoam surface as the reflecting body. One could image a home built cold light source, contained in a simple box, where the baffled circular fluorescent reflects from a small panel of styrofoam wall insulation, then through a piece of opal plastic or homemade groundglass just above the negative. The parts for this would probably go for les than $15 new. Ed Balko Balko, This would be way too dim for decent exposure times. Any lamp system you use will need a pre-heated cathode to keep the lamp at the same brightness when it turns on or a shutter system so that he lamp stays on all the time. Go for a used beer sign transformer and a custom-made lamp $40-60 at a neon sign shop. You will need a shutter under the lens. AZ Maker of Lookaround panoramic camera. www.geocities.com/soho/gallery/8874/ or keyword.com lookaround ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
