Hi! I've just started looking for the components I'm gonna need to make myself a DIY Projector...
I've come across this Halogen Light - specs:
130 volts
500 Watts
Base T3
118mm
4000 hours of life...
but it's only 2.49$!!!
is it really worth it to pick up something like this : https://secure.lumenlab.com/shop/product.php?id=15?
or should I go the cheap way and buy the other the 2.49$ lamp... (btw I'm poor 🙁 lol)
I've come across this Halogen Light - specs:
130 volts
500 Watts
Base T3
118mm
4000 hours of life...
but it's only 2.49$!!!
is it really worth it to pick up something like this : https://secure.lumenlab.com/shop/product.php?id=15?
or should I go the cheap way and buy the other the 2.49$ lamp... (btw I'm poor 🙁 lol)
Go for it man. It may run hotter and image might be yellowish but either way, you'll still get the picture.
Wow!
You just saved me tons of $, importing the light would have cost me A LOT.
Tanx man, now I just need to buy a 'reflector' for it... can I just put aluminium paper around?
You just saved me tons of $, importing the light would have cost me A LOT.
Tanx man, now I just need to buy a 'reflector' for it... can I just put aluminium paper around?
If you look at Overhead Projectors, they use halogen bulbs so it is ok to use.
Make sure you have a very good cooling system though or you'll end up paying more money for another LCD. Also putting in 2 isolation glass instead of 1 in your build will be advisable.
Aluminium foil will only act as heatshield not a reflector. You still need a reflector behind the lamp to get good brightness or the image will be dim.
Foil you won't be able to see a reflection, in a reflector you will be able to see your reflection. It coups all the wasted light and directs it to the LCD.
Make sure you have a very good cooling system though or you'll end up paying more money for another LCD. Also putting in 2 isolation glass instead of 1 in your build will be advisable.
Aluminium foil will only act as heatshield not a reflector. You still need a reflector behind the lamp to get good brightness or the image will be dim.
Foil you won't be able to see a reflection, in a reflector you will be able to see your reflection. It coups all the wasted light and directs it to the LCD.
k!
How much does a 'normal' reflector for a 15'' inch LCD costs?
Tanx for the help! and I'm gonna use some thick glass between the lamp & lcd panel. I'm a overclocking entusiast so, no problem for the cooling ^_-
How much does a 'normal' reflector for a 15'' inch LCD costs?
Tanx for the help! and I'm gonna use some thick glass between the lamp & lcd panel. I'm a overclocking entusiast so, no problem for the cooling ^_-
you are in luck!
Look at http://www.dr.ca website.
Then select "Pastry Moulds/Rings/Shapes" on the left side.
Then select "Stainless Steel Moulds".
Then scroll down to the "Stainless steel half sphere moulds".
They have many sizes, so you can select one to fit your lamp. These are mirror-finished stainless steel. If you cut a bit off the edge, you will get a perfect spherical reflector. I used a Dremel Mototool with (many) abrasive cutting wheels. Whatever you use, don't bend it out of shape.
I had to pay a lot for shipping to get one to California. You can just drive over and pick one up in Montreal!
Look at http://www.dr.ca website.
Then select "Pastry Moulds/Rings/Shapes" on the left side.
Then select "Stainless Steel Moulds".
Then scroll down to the "Stainless steel half sphere moulds".
They have many sizes, so you can select one to fit your lamp. These are mirror-finished stainless steel. If you cut a bit off the edge, you will get a perfect spherical reflector. I used a Dremel Mototool with (many) abrasive cutting wheels. Whatever you use, don't bend it out of shape.
I had to pay a lot for shipping to get one to California. You can just drive over and pick one up in Montreal!
Re: you are in luck!
Fantastic! 🙂
... I'm starting the project slowly, to optimize the cost of the final product. Just to get me started on the case model: What should be the distance between the lamp <-> lcd panel <-> lense if I'm using a 15'' inch lcd screen.
I won't be following any specific model, to again, drop the price as much as possible. Any tips on building the case right now would be greatly appreciated!
Guy Grotke said:
Fantastic! 🙂
... I'm starting the project slowly, to optimize the cost of the final product. Just to get me started on the case model: What should be the distance between the lamp <-> lcd panel <-> lense if I'm using a 15'' inch lcd screen.
I won't be following any specific model, to again, drop the price as much as possible. Any tips on building the case right now would be greatly appreciated!
distances
Maybe you should just buy one of the standard fresnel & triplet kits from one of the DIY stores. lumenlab.com has one for $65 US plus shipping. That gets you a set of fresnels & a projection lens that all work together.
Assuming you get a 220 mm fl condensor fresnel, a 317 mm fl field fresnel, and a 320 mm fl projection lens, here are some distances to start with:
lamp arc to condensor fresnel: 220 mm
condensor fresnel to LCD: 20 mm
LCD to field fresnel: 20 mm
LCD to projection lens: 350 - 390 mm
The LCD to projection lens distance is adjusted to focus the image on the screen. The correct location depends on the throw distance.
Once you get the projector running with an image focussed on a screen using the planned throw distance, then you could adjust the lamp arc position to get the best evenly lit image possible. This will be near 220 mm , but might be a cm or two off.
Maybe you should just buy one of the standard fresnel & triplet kits from one of the DIY stores. lumenlab.com has one for $65 US plus shipping. That gets you a set of fresnels & a projection lens that all work together.
Assuming you get a 220 mm fl condensor fresnel, a 317 mm fl field fresnel, and a 320 mm fl projection lens, here are some distances to start with:
lamp arc to condensor fresnel: 220 mm
condensor fresnel to LCD: 20 mm
LCD to field fresnel: 20 mm
LCD to projection lens: 350 - 390 mm
The LCD to projection lens distance is adjusted to focus the image on the screen. The correct location depends on the throw distance.
Once you get the projector running with an image focussed on a screen using the planned throw distance, then you could adjust the lamp arc position to get the best evenly lit image possible. This will be near 220 mm , but might be a cm or two off.
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