I am really new to this I just started reading up on this about 4 days ago. The people on this site have been a great help. What I want to do is something like what hillbilly has done. I also to make my own case. what are the best materials for the case??
to start with the parts
the lcd - a madcats console screen s-video inputs little over 7inch
the lense - http://www.surplusshed.com/pages/item/l1812.html
the mirror - http://www.surplusshed.com/pages/item/l2094.html
the light and ballest - 250w HQI Metal Halide Kit
The Questions
Am I missing any parts
is it normal for the ballest and light to be that expensive
Is 250 watt enough light for a 7 inch screen
Thank you in advance for any help
to start with the parts
the lcd - a madcats console screen s-video inputs little over 7inch
the lense - http://www.surplusshed.com/pages/item/l1812.html
the mirror - http://www.surplusshed.com/pages/item/l2094.html
the light and ballest - 250w HQI Metal Halide Kit
The Questions
Am I missing any parts
is it normal for the ballest and light to be that expensive
Is 250 watt enough light for a 7 inch screen
Thank you in advance for any help
Attachments
parts is parts
That is an electronic ballast, which is more expensive than a big old coil type magnetic ballast. Your option: You can build a much heavier projector for about $50 less using a ballast from somebody like goodmart.com. Or maybe you can find one locally and save a lot of money on shipping. If decide to find a lamp elsewhare, see if you can find one with a color temperature in the 5000 to 6000 K range. These forums have lots of info on lamp sources.
That projection lens is only good for LCD screens less that 4 1/2" diagonal. You need something more like a copy lens with focal length in the 200 to 250 mm focal length range.
250 Watts is enough if you make the screen image less than 100" diagonal. The throw distance doesn't matter, and the LCD size doesn't matter either, other than affecting the size of the screen image. All that matters is that the lumens output get spread out over a small bright image or a big dim image.
That is an electronic ballast, which is more expensive than a big old coil type magnetic ballast. Your option: You can build a much heavier projector for about $50 less using a ballast from somebody like goodmart.com. Or maybe you can find one locally and save a lot of money on shipping. If decide to find a lamp elsewhare, see if you can find one with a color temperature in the 5000 to 6000 K range. These forums have lots of info on lamp sources.
That projection lens is only good for LCD screens less that 4 1/2" diagonal. You need something more like a copy lens with focal length in the 200 to 250 mm focal length range.
250 Watts is enough if you make the screen image less than 100" diagonal. The throw distance doesn't matter, and the LCD size doesn't matter either, other than affecting the size of the screen image. All that matters is that the lumens output get spread out over a small bright image or a big dim image.
Also is it normal for a ballast to cost $150 any way to get them cheaper.
Or how many lumans do you need for low light situations.
cause there are leds that have 22 lumans for about 10 bucks
http://www.luxeonstar.com/item.php?id=327&link_str=189::191&partno=LXHL-FW1C
also a pic for the basic layout of the PJ
Or how many lumans do you need for low light situations.
cause there are leds that have 22 lumans for about 10 bucks
http://www.luxeonstar.com/item.php?id=327&link_str=189::191&partno=LXHL-FW1C
also a pic for the basic layout of the PJ
Attachments
halogen
Halogen lamps are much hotter than MH, and much too yellow. You can used to looking at just about anything, but a bright enough halogen lamp will cause very difficult heat problems. Get a MH lamp.
You can get magnetic core ballasts locally to save on shipping cost. (They weigh a lot!) MH is used for parking lots, architectural lighting, and store windows. So somebody in your town does have access to them. Just not the local home improvement store.
Or you can buy MH lamps from atlantalightbulbs.com. This one is pretty good for $33:
http://atlantalightbulbs.com/ecart/10Expand.asp?ProductCode=HQI-DE250.NDXEIKOBRAND
It uses an M80 ballast. You can get that from hellolights.com for $86:
These are a 250 Watt double-ended 4200 K lamp and a matching ballast. There are actually cheaper options if you go with a larger lamp, like:
http://www.goodmart.com/products/243708.htm
lamp for $21.33 and matching ballast for $45.36
Halogen lamps are much hotter than MH, and much too yellow. You can used to looking at just about anything, but a bright enough halogen lamp will cause very difficult heat problems. Get a MH lamp.
You can get magnetic core ballasts locally to save on shipping cost. (They weigh a lot!) MH is used for parking lots, architectural lighting, and store windows. So somebody in your town does have access to them. Just not the local home improvement store.
Or you can buy MH lamps from atlantalightbulbs.com. This one is pretty good for $33:
http://atlantalightbulbs.com/ecart/10Expand.asp?ProductCode=HQI-DE250.NDXEIKOBRAND
It uses an M80 ballast. You can get that from hellolights.com for $86:
These are a 250 Watt double-ended 4200 K lamp and a matching ballast. There are actually cheaper options if you go with a larger lamp, like:
http://www.goodmart.com/products/243708.htm
lamp for $21.33 and matching ballast for $45.36
ok, I have the ballast on order on ebay. My next question is will this lense work?? http://www.surplusshed.com/pages/item/l3311.html
yes it will
Yes, that 210 mm fl lens would give you a 95" diagonal image from 10 feet. You could use one 220 mm fl fresnel on each side of the LCD, 10 to 20 mm away from the surface of the LCD. Put the lamp arc 220 mm from the first fresnel. The projection lens will go around 225 mm from the LCD. All that would give you a nice bright image.
Yes, that 210 mm fl lens would give you a 95" diagonal image from 10 feet. You could use one 220 mm fl fresnel on each side of the LCD, 10 to 20 mm away from the surface of the LCD. Put the lamp arc 220 mm from the first fresnel. The projection lens will go around 225 mm from the LCD. All that would give you a nice bright image.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.