16mm Moviscop->LED upgrade

Discussion in 'The Projects Forum' started by larrysanders, Feb 16, 2012.

  1. larrysanders

    Thread Starter New Member

    Feb 16, 2012
    4
    0
    Hello Everybody,

    I need some basics electronics help.
    I want to replace the bulb on 16mm viewer Zeiss Moviscop with an LED.

    This is the viewer: http://www.flickr.com/photos/eoorider/5278039285/
    This is the bulb: http://www.cine60ny.com/osram-sylvania-25v-1a-ba15251158203.html
    This is the LED: http://www.mouser.com/Search/Produc...Avirtualkey61510000virtualkey889-AN320003W1GA

    What else do I need? I am decent soldering but don't know how to control the circuit voltage? I probably need a potentiometer, transistors?

    Thanks!
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,770
    970
    Are you okay with it being only 1/3rd as bright as the current bulb?
    Seems like bulb is 500 lumens and LED is 180 lumens max.

    Do you have a circuit board for this? ie did you buy the one already soldered to the hex pcb w/external resistors,etc..
    What are your plans for heatsinking? This will burn up in a very short time without proper heatsinking.
    What country are you in? (ie what is your typical wall outlet voltage)
     
  3. larrysanders

    Thread Starter New Member

    Feb 16, 2012
    4
    0
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,770
    970
    I have no idea why you linked to those parts.. Show us where someone did this conversion with those.. The first is a motor controller for a motorized headlight like you find on a Lexus,etc..

    Now.. We need to be careful because as it stands this discussion could go against the rules of this forum. No mains powered LED's. (This LED is intended as a mains powered LED). It is intended for LED lightbulb companies that know what they are doing as far as safety is concerned. It is in encased into a purpose build heatsink/lens,etc.. and this ensures its no more dangerous than a regular light bulb. Still want to proceed?

    Now before you go any further I hope you know that this project will probably cost you more money/time than you will save by switching to an LED versus that bulb. Do you still want to proceed?

    There are also much better choices as far as which LED to use and why...
     
  5. larrysanders

    Thread Starter New Member

    Feb 16, 2012
    4
    0
    I am sorry, I linked to those parts because I know they were used to perform this same conversion. I don't have a link to that online, or a way to get in touch with the person who did it, that's why I tried posting here. Thank you so much for your help/

    That exact motor controller was linked to a potentiometer so that the LED could be adjusted for brightness. The LED was attached to the inside of the Moviscop viewer, possibly with an epoxy? I don't think any fan was installed. I believe the fuse was also disconnected? There's a knob on the moviscop that lets you adjust the fuse for the AC mains. This link has the original moviscop viewer manual which may help? http://www.cinematography.com/index.php?showtopic=7735
     
  6. larrysanders

    Thread Starter New Member

    Feb 16, 2012
    4
    0
    According to that manual, there is a built-in condensor that absorbs approx 70% of the heat from the bulb without any loss of light.

    thanks again
     
  7. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,770
    970
Loading...