Has anybody looked at the backlights for laptop LCD s for this job. Older models (laptops) can be picked up fairly cheaply, and maybe for free if something else died than what you need. You do have to be careful; the power supplies for cold cathode backlights can deliver much voltage and considerable current and could be deadly. Typically these have multiple inputs for power (in the range of 10 to 12 volts but could have other values according to the model.), on/off (saves power when the laptop is running on battery but is idle), and intensity. You must work out the connections or try to follow them in the laptop before finishing it off. The lights are moderately bright and dimming could be handy, yet is a normal function of these sources.
Bob At 08:34 01.09.02 -0700, you wrote: >At 06:07 PM 8/31/2002 -0700, you wrote: > >I think they are right around $500.00 but have got to imagine there is > >a way to build one cheaper. > > > > > >Robin > > > >Uptown Gallery wrote: > > > >>Hello: > >> > >>Anyone have an idea what an Aristo cold head for 8x10 enlarger costs? > >> > >>Murray > >> > >>_______________________________________________ > >Guys, > >I have instructions for building a panoramic enlarger on my web pages. The >section about the lamp may be of help for any size enlarger. The Aristo type >heads have pre-heated cathodes so that they stay the same brightness each >time the lamp turns on. If you do not have this you need a light shutter. I >have simple instructions for making that. >I have had custom-size grid lamps made at neon sign shops for around $40. >They will assist you with laying it out and choosing a transformer. Also the >difuser placement is important. Even commercial models get that wrong! The >difuser is 1/8 in. milk-white plex also found at a sign shop. > >AZ >Maker of Lookaround panoramic camera. >http://www.panoramacamera.us > or >keyword.com lookaround > > >_______________________________________________ >Cameramakers mailing list >[EMAIL PROTECTED] >http://rmp.opusis.com/mailman/listinfo/cameramakers _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
