DIY Video Projector Part II

thread didn't simplify enough

Well zardoz i read the thread and i didn't find any problem with my solution....In fact when you think that you can easily drain the "tub" that the lighting fixture sits in and can also place ice cubes in the tub....welll...it works out rather nicely....And all the problems discussed in that thread are solved....including noise...
Here's a sketch:
 

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HOME FIRE!!!!!!!!!!!!!!!!!!!!!!!!!

Please no one try this without a circuit breaker in your electrical system.

Without one you have an EXTREMELY high chance of a major fire occuring...

But with a nice fuse in your wiring....This solves the heat/noise problem.

Thanks
And please somebody hook me up with an lcd deal for my projector for such a beautifully simple solution....

P.S. i think most people missed this solution because they were all thinking in terms of PC case cooling....

But light fixture cooling is a whole different ballgame....Only one wire and the fixture can be encapsulated.
 
water cooling

Man...
I thought I was nuts!
You guys have really lost it on this one!

It's the LCD that needs cooling, not the MH lamp. Have you ever seen a cooling fan on a grow lite or warehouse lite????

And the only really efficient way to cool the LCD is to not try to shove the wrong polarity of light through it. ALA- light recycling- repolarization.
 
Re: water cooling

proto5 said:
Man...
I thought I was nuts!
You guys have really lost it on this one!

It's the LCD that needs cooling, not the MH lamp. Have you ever seen a cooling fan on a grow lite or warehouse lite????

And the only really efficient way to cool the LCD is to not try to shove the wrong polarity of light through it. ALA- light recycling- repolarization.


NO NO....The LCD Cooling is the easy part...with filter (UV/IR) glass and air space....The Major problem is ambient heat, espescially with halogen...and this water tub could act as a GIANT heat sink for heat throughout the projector as well..

Please post comments suggestions in the "Submersibles" thread...

And ice cubes is no problem...just keep some in the fridge for your projector....and they may not even be needed...water might be enough......and cheaper than wasting electricity on fans...and removes *ALL* noise....

thank you
 
Marklar, your right! a fan should take care of keeping the lamp cool. They are made to get hot. Those 400 watters are usually in overhead lamps as seomone said before with no cooling. What we really need to focus on is keeping the lcd cool, so the picture quality will not degrade over time. By polarizing the light, this should iliminate much of the heat caused by brute forcing, and even better, improve picture quality.
 
LCD HEAT

The LCD gets hot from absorbing the 1/2 of the light that is not the right polarity. To cool it effectively you need forced air onto the bottom of the LCD.
Or you can separate the polarizer from the LCD. Not for the faint -hearted. I'm waiting for parts to test the theory.
 
As far as keeping the lcd cool the low-e glass is doing a good job when i take it out the lcd starts turning black after about 30 sec when the light reaches full brightness but with the glass in place i can leave it on for hours and hours with no problems. There is no need to cool the lamp really i like to have a fan in there because i got a wooden box and if the temp gets to hot cuz of lack of circulation im sure the wood could catch fire, the fan is actuly quieter than the ballast so I really done see a noise problem. Also I belive dyna mat makes a heat insulator that you can line your box in to keep it from burning or melting.