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Author Topic: Getting the most out of your RED LED. Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-08-2006 07:38 PM                     quote: Mark Gulbrandsen An additional way to prolong the LED aside from the method that Brad gives is to place the AC side of the Scanner power supply on either the Exciter contacts or across the motor terminals so its off when film is not running. This alone can add another 3 years of life to an LED. Aside from the method I recommended? I gave two. Go 9 posts up above yours.  |  IP: Logged Ian Bailey Master Film Handler Posts: 317 From: Nambucca Heads, Australia Registered: Jun 2003 posted 03-08-2006 09:52 PM                     Ok I can see where I'm getting confused here! When I said I had Component Engineering readers the assumption was made that I had C.E. power supplies.That is not the case. the power supplies I have connected to my readers are: Brand Name PROTEK Model PX53-31-9A Input 240 volt A.C. @ 0.8 amps Output +5volt D.C. @ 6 amps +12 volt D.C. @ 2 amps -12 volt D.C. @ 0.5 amps Looks awfully much like a power supply for a P.C. to me!! There is no current adjustment and I think there is a dropping resistor in series with the LED. Is this my problem why my LEDS don't last and I never have much headroom adjustment for setting Dolby levels at the processor? If so would it solve my problems getting CE power supplies? Do I have any other options regarding power supplies? THX Ian  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-08-2006 10:01 PM                     quote: Brad Miller Aside from the method I recommended? I gave two. Go 9 posts up above yours. I did see your post but no where in it did I see that you mention it can add 3 years of longevity to the LED. Do the math... it does. Mark  |  IP: Logged Robert Burtcher Expert Film Handler Posts: 194 From: Oklahoma City, Oklahoma Registered: Jun 2005 posted 03-08-2006 11:12 PM                     Just what kind of LEDs do these things use? For the price you guys are saying, it sounds like a Luxeon 5 Emitter on steroids or something. [ 03-09-2006, 04:09 PM: Message edited by: Robert Burtcher ]  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 03-09-2006 01:02 AM                     I figured the math would've been obvious by turning it off when the projector was not running, but then again perhaps not.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 03-09-2006 10:35 AM                       Ian, It is possible you have a copy or knockoff of the CE reader. Such were made by a Don Howard from your country with some help from Ray Derrick. This might explain why you have readers with no power supply. One way to tell is to see if the ring or fixture that holds the LED is made of copper or aluminum. CE's were made of Copper which is very diicult to machine. The CE LS-40 power supply is a good general purpose supply for this application.  |  IP: Logged Ian Bailey Master Film Handler Posts: 317 From: Nambucca Heads, Australia Registered: Jun 2003 posted 03-10-2006 01:53 AM                     Hi Sam No it's not one of Don's readers and yes it is a CE reader with the fixture that holds the led being copper.Just not a CE power supply. Any idea what a CE LS-40 power supply costs? And are there any alternatives? ian  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-10-2006 08:25 AM                     quote: Ian Bailey Any idea what a CE LS-40 power supply costs? And are there any alternatives? Well under 100.00 U.S. unless a dealer is ripping you off. Uoi could also build one or have a local electronics guru build one for you. They're very simple. MArk  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-10-2006 08:25 AM                     quote: Ian Bailey Any idea what a CE LS-40 power supply costs? And are there any alternatives? Well under 100.00 U.S. unless a dealer is ripping you off. You could also build one or have a local electronics guru build one for you. They're very simple. MArk  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 03-10-2006 10:40 AM                       I would go with the LS-40 as it works perfectly for this application and has a built in shutoff for the LED current. Even I, as a competing company to CE uses them for specific applictions.  |  IP: Logged

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