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Lumenlab > LLAVS: Lumenlab AVS > Advanced Projector Builder > Projectors based on small panels
grovestreet
was at wal-mart today. and noticed mini cfl bulbs that sparked my interest. putting out 825 lumens a peice. since its gonna be another 2 weeks before i recieve my p7 LEDS ive been itching to mess with this thing still

picked up a two pack. with bulb socket adapters, a dual plug socket and a lightswitch.

i plan on running both of these cfl inside my toshiba tlp-410. im not sure what to do about if i need a relector or mirror behind these lights. but any input would be appreciated

this is only a 17 dollar experiment. so well see where it goes. if it works fine, if not i wont be heartbroken

please excuse the bad pictures till i get new batterys for my camera!








jonjandran
It's been tried several times before.

You will get around 2-3 lumens on the screen. So no you won't like it.

But it is only a $17 project biggrin.gif
grovestreet
QUOTE (jonjandran @ Feb 27 2009, 09:29 AM) *
It's been tried several times before.

You will get around 2-3 lumens on the screen. So no you won't like it.

But it is only a $17 project biggrin.gif



yes this was a total failure. i also noticed a 12v halogen bulb for outside lights that claims to put out around 1900 lumens. for 7 dollars i cant help but try it biggrin.gif

but im going to need to find a way to compress the beam to about what 5 degrees? that im not sure of.
grovestreet
was at officemax and came across this



i read a couple articles where these gave out promising results. and i happen to have an old overhead laying around i can grab the circuit out of. so getting down to 82v should no be a problem at all!
grovestreet
since i have no life and i will be up all night. i should have some more pics for everyone!
Quasi_Mojo
Those FXL projector lamps usually have about 75 hours of lamp life.
grovestreet
everythings set up and wired!

will post pics of the outcome.








for the price. and the output 75 hours is worth it. yeah there 30 bucks at officemax. but im sure looking around online i can get them alot cheaper..
grovestreet
worked very well!!

wish i coulda got some pics but those bulbs get super hot!! it tripped the thermal switch in only a few minutes. i guess next step is a very good cooling system!
grovestreet
the overall image came out better than i had even hoped for. this is by far. the cheapest. easiest to get ahold of projector retrofit. no waiting online for parts. everything can be bought at officemax ( although i do recomend searching online to get the bulb cheaper)

even without the internals from an overhead projector. reducing the voltage to 82volts can simply be done with a household dimmer switch ( a voltmeter is your best friend)

the only drawback is the heat. it closed the thermostatic switch within 5 minutes of running. MAJOR cooling system upgrades are on the agenda for tommorow. but i still think this was all worth it.

i will post more pics tommorow after i can get this thing running cooler. its about 4am right now and ive been working on this since 11. the delays were from running back and forth to wal-mart buying screws, drillbits, and happening to get pulled over on the way back biggrin.gif biggrin.gif biggrin.gif

heres the images i happened to get a few minutes ago. hope you guys are as satisfied as i am!





Quasi_Mojo
A recent quote from SupraGuy:

QUOTE (SupraGuy @ Feb 26 2009, 09:29 AM) *
Right... The OHP lamps are cheap in the short term only. While $5 sounds like a pretty cheap lamp next to spending $150 for a lamp and ballast (Basing cost on an eVo ballast plus lamp from the LL store) when you work it out on a per hour basis, the MH lamp looks much nicer a deal.

Work it out based on 15,000 hour life expectancy for hte MH lamp vs 75 hour life expectancy for the OHP lamp. The MH lamp will out-last 200 of the OHP lamps, so that $5 turns into $1,000 when you've bought 200 of them. The $150 for the MH lamp is still $50. Double that life expectancy, and the OHP lamps are now $2,000, and the MH lamp is only $180.

Of course that's not the only thing that they show there. I saw one mod where they were taking a cheap MH lamp and retrofitting it into the housing for the $400 lamp. If the wattage matches the existing lamp, THAT pays off. They'll also get the extended life expectancy from the cheaper lamps.
grovestreet
you show me a MH bulb that with a small enough arc. that wil fit in as easily as this does and i will put one in without a problem!
Quasi_Mojo
I'm just saying...
wink.gif
grovestreet
i appreciate the help.

just seems this is the most user friendly right now. im kinda confined to space thats the only problem.
grovestreet
made this into a plog.

please feel free to delete this thread if needed!

plog

http://www.lumenlab.com/forums/index.php?s...t=0#entry303955
SupraGuy
I figured that I'd put this here, instead of the PLOG.

Regarding the MH lamps, the eVo lamp should fit just fine in that cage. That gets you as much or more light than the 400W halogen, with less than 1/3 the heat. This shoud allow you to tone down the fans, so that the projector runs more quietly, as well as benefit from $30 lamps which last for 15,000 hours. As in my quote above (Thanks, Quasi. wink.gif ) the cost per hour starts adding up, depending on how much you use the projector.

The eVo ballast is small, but it's not the only way to go, either. 150W MH lamps come in packages smaller thant he CFLs which you tried initially, so there's certainly room to install one.

The ballast is a bit trickier, but I'm sure that it can be managed. The eVo ballast is about the smallest that I know of for a 150W MH lamp, but they're not hard to find in 3" by 2" by 14" packages, which could be extended onto the side of the projector.

The point being that you can get these lamps for $4 to $5 online, which sounds great, but the cents per hour doesn't work out to your advantage in the end, even excluding the energy cost.

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