Man, this is the project that I have alwasy been waiting for!!
I understand the basics behind the projection systems, I have
also played arround with a 2.5" a pocket tv LCD screen and a 500W Halogen lamp (that got hot!!) and had well err some
results. The pixles are too big and not enough of them.
I will have to get a larger LCD and better light setup.
I have seen that a PC flat panel LCD/TFT has been used by some
of the users of this forum.
My qusetion is, Is that all i need? 1xLCD, 1xOHP, 1xviewing screen
and hay presto !!
I see some have changed the lamp in the OHP, what is the reason for this? whay can't you use the standard lamp.
Sorry if the questions i have asked are a little basic !! I'm new to
the subject, and need lots of help 😛
TIA
Steve
I understand the basics behind the projection systems, I have
also played arround with a 2.5" a pocket tv LCD screen and a 500W Halogen lamp (that got hot!!) and had well err some
results. The pixles are too big and not enough of them.
I will have to get a larger LCD and better light setup.
I have seen that a PC flat panel LCD/TFT has been used by some
of the users of this forum.
My qusetion is, Is that all i need? 1xLCD, 1xOHP, 1xviewing screen
and hay presto !!
I see some have changed the lamp in the OHP, what is the reason for this? whay can't you use the standard lamp.
Sorry if the questions i have asked are a little basic !! I'm new to
the subject, and need lots of help 😛
TIA
Steve
Teleteq said:
Yes you need 1 lcd ,1 ohp ,1 viewing screen to have a big projector.
The reason many have changed the lamp inside their OHP's is because the halogens are too hot and not bright enough. Many have converted to metal halide although there are some OHP's that come stock with a 575w metal halide bulb.
You can either use a LCD flat panel pc monitor that has movable ribbon cable vg150 is all I know of. Or you can buy any number of the overhead projection panels on ebay. And no a laptop screen won't work without an expensive controller.
disagree
I have to disagree with the laptop screen thoughts. A controller can be had for about $150.00 US, laptop screens are some of the easiest to remove the backlighting gear. And the added bonus? if you "pooch" the laptop screen you are only out the cost of the screen, not the expensive controller gear that is mounted on the back of the desk top monitor.
zardoz
I have to disagree with the laptop screen thoughts. A controller can be had for about $150.00 US, laptop screens are some of the easiest to remove the backlighting gear. And the added bonus? if you "pooch" the laptop screen you are only out the cost of the screen, not the expensive controller gear that is mounted on the back of the desk top monitor.
zardoz
Ok You say
From this I take it that this is for the electronics of the panel
to be moved out of the way. Also that there are panels that you
cannot move the electronics out of the way.
I was intending to use a LCD PC monitor arround 15" or so, are
thare any models that I should stay away from ?? or is it a case
of "Pay your money and take your chance"?
Steve
From this I take it that this is for the electronics of the panel
to be moved out of the way. Also that there are panels that you
cannot move the electronics out of the way.
I was intending to use a LCD PC monitor arround 15" or so, are
thare any models that I should stay away from ?? or is it a case
of "Pay your money and take your chance"?
Steve
Teleteq-
My opinion is that if you want VGA or SVGA, get a projection-panel.
If you want XGA (and don't already have a panel), buy a $200 14" desktop LCD monitor. Like zardoz said, there is a risk of ruining the whole thing, but even if you don't get it to work, you can most likely put it back together and still have a monitor to use. You might even be able to return it.
If you want SXGA, SXGA+, or UXGA and you already have a nice graphics card, buy an A/D converter (or D/D if you have a DVI panellink output). There are no UXGA 15" desktop monitors (minimum size for OHP), and the SXGA ones are too much $$$.
If you already have a panel you want to use (or can get one for really cheap), and your graphics card is nothing special, get a PCI LCD controller (see zardoz's post).
My opinion is that if you want VGA or SVGA, get a projection-panel.
If you want XGA (and don't already have a panel), buy a $200 14" desktop LCD monitor. Like zardoz said, there is a risk of ruining the whole thing, but even if you don't get it to work, you can most likely put it back together and still have a monitor to use. You might even be able to return it.
If you want SXGA, SXGA+, or UXGA and you already have a nice graphics card, buy an A/D converter (or D/D if you have a DVI panellink output). There are no UXGA 15" desktop monitors (minimum size for OHP), and the SXGA ones are too much $$$.
If you already have a panel you want to use (or can get one for really cheap), and your graphics card is nothing special, get a PCI LCD controller (see zardoz's post).
I was intending to use the panel with a standalone dvd player,
and a s-video - vga converter for films, and using my
gforce4 4600 for gameing (pushing it a little prob 🙂 ).
Is this option over the top??
I have been looking at projection panels but thought that the
monitors had better contrast, or am I going off the path here??
and a s-video - vga converter for films, and using my
gforce4 4600 for gameing (pushing it a little prob 🙂 ).
Is this option over the top??
I have been looking at projection panels but thought that the
monitors had better contrast, or am I going off the path here??
You really need to read a lot before you decide what to do. Most laptop panels do have better contrast than the projection-panels I've seen.
Let me tell right now though that if your going to hook up a computer anyways (you said your using a GeForce 4), don't even bother with a standalone DVD player. Complete waste. Get a DVD rom drive and you'll have a beautiful non-interlaced digital image.
Let me tell right now though that if your going to hook up a computer anyways (you said your using a GeForce 4), don't even bother with a standalone DVD player. Complete waste. Get a DVD rom drive and you'll have a beautiful non-interlaced digital image.
Your cheapest DIY style out of the box sollution I think is an LCD monitor, but remember if you scrap the LCD screen or a controller board or maybe even just a ribbon cable while you make the modifications....the whole thing could be scrap.
Laptop screens require a seperate controller. It might be in the form of a graphics card, mine is only an 8 meg card and good for SVGA. The laptop screen is no less important, mine is a rather mediocre LCD in todays laptop's, but it really does a nice job with DVD's ( I can wait to get a better panel ) and I think it will probably out perform many of the "projection panels". Black appears to be Black on the projected image 300:1 contrast.
Lifter and others (myself included) are looking at "stand alone controllers" these accept signals from MANY different sources. VGA, DVI, composite, RGB. Some support up to UXGA and THAT would rock the house! With one of these you can feed it from your video card with all of it's might, I have a Radeon8500/ 128 DDR that screams! But it's no good to me on the big screen with my current set up, for now that's no big deal for me. These unit's are averageing double the price of the "graphics card" style such as mine, but MUCH more versatile.
With the laptop LCD method of DIY you would only normaly be risking one component or the other, the screen being the more likely to fall victim. (sometimes thats the cheapest component)
Or you can go the way of the projection panel, I dropped that idea in a hurry. Mostly just because it was too easy. I've spent HOURS trying to learn all that I can and think I chose the right path. The quality of a decent laptop screen normally outstrips a projection panel.
Or you could go the route of the LCD in-car TV, small low res. But the price is right about $100.00 US and some/most have composite video feed. Not my thing...that is untill they get a better resollution.
Merry Christmas
zardoz
Laptop screens require a seperate controller. It might be in the form of a graphics card, mine is only an 8 meg card and good for SVGA. The laptop screen is no less important, mine is a rather mediocre LCD in todays laptop's, but it really does a nice job with DVD's ( I can wait to get a better panel ) and I think it will probably out perform many of the "projection panels". Black appears to be Black on the projected image 300:1 contrast.
Lifter and others (myself included) are looking at "stand alone controllers" these accept signals from MANY different sources. VGA, DVI, composite, RGB. Some support up to UXGA and THAT would rock the house! With one of these you can feed it from your video card with all of it's might, I have a Radeon8500/ 128 DDR that screams! But it's no good to me on the big screen with my current set up, for now that's no big deal for me. These unit's are averageing double the price of the "graphics card" style such as mine, but MUCH more versatile.
With the laptop LCD method of DIY you would only normaly be risking one component or the other, the screen being the more likely to fall victim. (sometimes thats the cheapest component)
Or you can go the way of the projection panel, I dropped that idea in a hurry. Mostly just because it was too easy. I've spent HOURS trying to learn all that I can and think I chose the right path. The quality of a decent laptop screen normally outstrips a projection panel.
Or you could go the route of the LCD in-car TV, small low res. But the price is right about $100.00 US and some/most have composite video feed. Not my thing...that is untill they get a better resollution.
Merry Christmas
zardoz
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