Gustavo,
Many moons ago I mentioned that, "the image was still dim..."
I was talking about using a normal laptop with normal brightness to demonstrate how a large LCD panel could be used with a fresnel to project an image.
The dimness was because the light output of my laptop is not very high, and while it is ok to use, it is not good for projecting with... 😉
If I put a high power light source behind the screen, the image would be much brighter when projected on the wall, but without shades, it would be unusable as a laptop. 😎
Bill.
Many moons ago I mentioned that, "the image was still dim..."
I was talking about using a normal laptop with normal brightness to demonstrate how a large LCD panel could be used with a fresnel to project an image.
The dimness was because the light output of my laptop is not very high, and while it is ok to use, it is not good for projecting with... 😉
If I put a high power light source behind the screen, the image would be much brighter when projected on the wall, but without shades, it would be unusable as a laptop. 😎
Bill.
no reaction ?
I do not understand why this forum cannot see success when there is
i posted some pics yesterday from my projector, homemade, and working perfectly, thank you. and no one replied .... ???
Is this perhaps a) because i used the FLUOREX 65 watters ? i noticed that some people are completely ignoring them = those i invite to come and see The hunt for Red October and i will record their reactions........
b) is it perhaps because success is not an option ????
c) perhaps someone on this forum is trying to invent hot water???
---- I watch movies now on a 95 by 48 screen (yes plas tek poly white) with a MINTEK dvd player that costed me $69.00 at Best Buy (new , not refurbished === people that buy dvd plaers on ebay should have to see this one! plays about every format there is including karaoke, dvd's that i copied with dvd copy plus = VCD format etc etc..
I have 16/9 format & wide screen at home for less than a regular tv. My whole project without the dvd player costed me (including the wooden toy box (from IKEA for $9.95) US$160.00
I will be posting pics on a regular basis, including pics during projection, as long as the moderator does not kick me out of here .
I enjoy it very very much!
now for me, and i suggest all of you, your next project or for most of you you the first one( i suspect) will be a lcd projector with a lcd monitor screen of 2.5" or smaller , so that the whole casing can be a bit more compact... i admit that 25"*16"*11" is a bit big.
This should really become the talk of the town as.....
a projector with a 5.6" and FLUOREX floodlight is already working boys!
I do not understand why this forum cannot see success when there is
i posted some pics yesterday from my projector, homemade, and working perfectly, thank you. and no one replied .... ???
Is this perhaps a) because i used the FLUOREX 65 watters ? i noticed that some people are completely ignoring them = those i invite to come and see The hunt for Red October and i will record their reactions........
b) is it perhaps because success is not an option ????
c) perhaps someone on this forum is trying to invent hot water???
---- I watch movies now on a 95 by 48 screen (yes plas tek poly white) with a MINTEK dvd player that costed me $69.00 at Best Buy (new , not refurbished === people that buy dvd plaers on ebay should have to see this one! plays about every format there is including karaoke, dvd's that i copied with dvd copy plus = VCD format etc etc..
I have 16/9 format & wide screen at home for less than a regular tv. My whole project without the dvd player costed me (including the wooden toy box (from IKEA for $9.95) US$160.00
I will be posting pics on a regular basis, including pics during projection, as long as the moderator does not kick me out of here .
I enjoy it very very much!
now for me, and i suggest all of you, your next project or for most of you you the first one( i suspect) will be a lcd projector with a lcd monitor screen of 2.5" or smaller , so that the whole casing can be a bit more compact... i admit that 25"*16"*11" is a bit big.
This should really become the talk of the town as.....
a projector with a 5.6" and FLUOREX floodlight is already working boys!
guawan's sheet
by the way, there is a serious flaw on gunawan's excell sheet with one and 2 lenses. Something that is truly impossible ...
i wonder if anyone else has noticed this...
by the way, there is a serious flaw on gunawan's excell sheet with one and 2 lenses. Something that is truly impossible ...
i wonder if anyone else has noticed this...
Re: no reaction ?
do you have any pics of the actual image produced? i mean it's all well and good to post pics of the enclose, but what are we going to say/comment? nice IEC plug and switch?
uvodee said:
do you have any pics of the actual image produced? i mean it's all well and good to post pics of the enclose, but what are we going to say/comment? nice IEC plug and switch?
Re: no reaction ?
Oh, I saw your pics 😀
But people will really comment when they see a final result. Show the people some displayed images 🙂
I do like the switch you used. looks tough and will last long 😉
uvodee said:
Oh, I saw your pics 😀
But people will really comment when they see a final result. Show the people some displayed images 🙂
I do like the switch you used. looks tough and will last long 😉
65watt LOA
I would absolutely like to see more on uvodee's projector. But what was posted was just not enough to get a good idea of it's total construction and results.
Uvodee, how about some pic's of the whole box so we can see how you finally put it all together. The box construction, the light - lense configurations, etc... You know, wide angle shots of the whole shabang.
I'd really like to see how people are mounting their Disassembled LCD's ( for those of us that are using the small disassembled monitors ) as I am having trouble getting a tight enough fit around it to prevent light through the edges of the mounting. Did you expoxy it to a piece of glass or construct a frame so there was no additonal light interference? Being too forceful and breaking it is not an option. Although $120 is a pretty good price, they're too expensive to replace all the time.
I for one don't care if two wax candles can be made to work well enough to generate a good quality image! What I posted earlier is working pretty well, though hopefully I didn't give anyone the impression that I had duplicated a $5,000 commercial projector🙄 . I just think that for a very first time attempt that it puts out a good picture with no screen door or moir (is that spelled right?).
I'd still like to hear from anyone who is using or has tried using a condenser lense and two fresnels without a final objective lense. From what I can see, it's going to work out real well. It's just a matter of mounting it all in a frame and keeping the plastic fresnels perfectly flat.
I would absolutely like to see more on uvodee's projector. But what was posted was just not enough to get a good idea of it's total construction and results.
Uvodee, how about some pic's of the whole box so we can see how you finally put it all together. The box construction, the light - lense configurations, etc... You know, wide angle shots of the whole shabang.
I'd really like to see how people are mounting their Disassembled LCD's ( for those of us that are using the small disassembled monitors ) as I am having trouble getting a tight enough fit around it to prevent light through the edges of the mounting. Did you expoxy it to a piece of glass or construct a frame so there was no additonal light interference? Being too forceful and breaking it is not an option. Although $120 is a pretty good price, they're too expensive to replace all the time.
I for one don't care if two wax candles can be made to work well enough to generate a good quality image! What I posted earlier is working pretty well, though hopefully I didn't give anyone the impression that I had duplicated a $5,000 commercial projector🙄 . I just think that for a very first time attempt that it puts out a good picture with no screen door or moir (is that spelled right?).
I'd still like to hear from anyone who is using or has tried using a condenser lense and two fresnels without a final objective lense. From what I can see, it's going to work out real well. It's just a matter of mounting it all in a frame and keeping the plastic fresnels perfectly flat.
lcd panel in germany
hi!
so nobody knows where could i purchase a lcd panel in germany ?
preferible Sharp @ 800x600, active, polychromatic
any ideas ?
thanks
hi!
so nobody knows where could i purchase a lcd panel in germany ?
preferible Sharp @ 800x600, active, polychromatic
any ideas ?
thanks
uvodee
Way to go
So now we have options.
I would be interested in seeing your setup.
Man that would be great to go from 400watts to 130watts
and a lot less heat.
Keep us posted
My settup is also working great.
But will be willing to save money on energy bill.
Also to measure our light output to the LCD we should set a standard.
Example: Find a standard solar cell, say from Radio Shack.
Something that we can all get. Then attach a volt meter to it.
Put the cell in the centre of the LCD and 4 corners on the light side and measure the voltage.
The person with the same 5 voltage readings and the highest
would be the winner
Later
Way to go
So now we have options.
I would be interested in seeing your setup.
Man that would be great to go from 400watts to 130watts
and a lot less heat.
Keep us posted
My settup is also working great.
But will be willing to save money on energy bill.
Also to measure our light output to the LCD we should set a standard.
Example: Find a standard solar cell, say from Radio Shack.
Something that we can all get. Then attach a volt meter to it.
Put the cell in the centre of the LCD and 4 corners on the light side and measure the voltage.
The person with the same 5 voltage readings and the highest
would be the winner
Later
Redevil hmmm It would be cool if we could simply measure it that way but there are some problems. For one distance from the lcd is a issue,not all cells are the same in their light picking up,multimeter that would test the light cell would be different,we would have to have the same image going into the panel,ambient light picked up. See although it would be cool if there was an easy way to measure brightness there isn't.
Solution for NVIEW vSYNC problems
I've been hearing alot of ppl say that their panels arive either defective or not copatible with their videocards .. in both cases i'm talking about vsync problem (screen jumps)
here are POWERSTRIP settings that corrected that little nasty on my panel 🙂
I've been hearing alot of ppl say that their panels arive either defective or not copatible with their videocards .. in both cases i'm talking about vsync problem (screen jumps)
here are POWERSTRIP settings that corrected that little nasty on my panel 🙂
Attachments
and now Fibonacci
I really question ( and more often than you think) the honesty of R&D depts when it comes to the purpose of launching completely useless, inefficient products, hence some of them based on conclusions that were given in by sales and not by knowledgeable beings. Let me explain
1+2=3. 3+2=5,5+3=8,8+5=13, 13+8=21,21+13=34,34+21=55.
correct ? i think so, now when you divide the result with the first factor the figure you get is always (ALWAYS) 1.61
example 55/34 or 34/21 both result in 1.61
this is called the Gulden Snede or Golden Cut i think in English
(poor Fibonacci struggled more than 1.61 years to understand why.....
The gulden snede was ( and is still used by painters (visual artists) in order to create a PERFECT picture for the viewer.
How was this done?
well let's say a portrait: every inch horizontally should have 1.61 inc vertically so a portrait of 20 inches wide, MUST be 32.2" heigh
For a Landscape the opposite is through
55 inches wide gives 34.16" heigh.
Ask you eye doctor why this 1 on 1.61 is so perfect.
and Could any one answer me this... why are those darn Matsushita r&d people studying the golden cut for a possible new type of screen ( likely to be within 2 years on the market!!!!!!!!!)
I really question ( and more often than you think) the honesty of R&D depts when it comes to the purpose of launching completely useless, inefficient products, hence some of them based on conclusions that were given in by sales and not by knowledgeable beings. Let me explain
1+2=3. 3+2=5,5+3=8,8+5=13, 13+8=21,21+13=34,34+21=55.
correct ? i think so, now when you divide the result with the first factor the figure you get is always (ALWAYS) 1.61
example 55/34 or 34/21 both result in 1.61
this is called the Gulden Snede or Golden Cut i think in English
(poor Fibonacci struggled more than 1.61 years to understand why.....
The gulden snede was ( and is still used by painters (visual artists) in order to create a PERFECT picture for the viewer.
How was this done?
well let's say a portrait: every inch horizontally should have 1.61 inc vertically so a portrait of 20 inches wide, MUST be 32.2" heigh
For a Landscape the opposite is through
55 inches wide gives 34.16" heigh.
Ask you eye doctor why this 1 on 1.61 is so perfect.
and Could any one answer me this... why are those darn Matsushita r&d people studying the golden cut for a possible new type of screen ( likely to be within 2 years on the market!!!!!!!!!)
Attachments
screen mounting
I thought my screen was going to break if i just screwed it against some mounting frame, so i used a black foam i bought at Lowe's to place it between the screen and the wood frame....
i kept the plastic frame from the LCD so it was a piece of cake to use tiny screws for mounting it. I am going to look for the pics of that and will post them, i hope tomorrow!
I thought my screen was going to break if i just screwed it against some mounting frame, so i used a black foam i bought at Lowe's to place it between the screen and the wood frame....
i kept the plastic frame from the LCD so it was a piece of cake to use tiny screws for mounting it. I am going to look for the pics of that and will post them, i hope tomorrow!
Ready to throw in the towel...
After hours of re-jigging the light and optics, I went to try out the panel in the light path, and with a small puff of white smoke, my panel is dead.
I've been working on this since beast since april, and I'm at wit's end.
I now have a very nice 400 W MH ballast/socket/lamp with only about 1 hour of use that's ready for a new home. I've also got two fresnels and the objective lens head from an OHP that I won't be needing...
Turns out the optimal focus for the reflector was much lower than I had been using, so I cut out the bottom portion to situate the filiment at the focus, and lo and behold, a ton of light now screams out the top.
Too bad there's nothing to shine it at.
dave.
After hours of re-jigging the light and optics, I went to try out the panel in the light path, and with a small puff of white smoke, my panel is dead.
I've been working on this since beast since april, and I'm at wit's end.
I now have a very nice 400 W MH ballast/socket/lamp with only about 1 hour of use that's ready for a new home. I've also got two fresnels and the objective lens head from an OHP that I won't be needing...
Turns out the optimal focus for the reflector was much lower than I had been using, so I cut out the bottom portion to situate the filiment at the focus, and lo and behold, a ton of light now screams out the top.
Too bad there's nothing to shine it at.
dave.
Hi Daveb,
you're right, if you use parabolic reflector at it's focus point, but there is another way, see my sketch below, if you can put your lamp at a distance shorter than reflector fl. you will get spreading light beam.
Put the lamp & the reflector at fl. of fresnel panel, then you get parallel light output.
Moving the lamp unit backward (> fl. of fresnel) the light beam start to condense! Keep moving it until the light beam just fit your objective lens.
Good luck.
Hi uvodee,
Please tell me what is wrong in my excel sheet, so maybe I can fix it if have enough knowledge, thank you.
you're right, if you use parabolic reflector at it's focus point, but there is another way, see my sketch below, if you can put your lamp at a distance shorter than reflector fl. you will get spreading light beam.
Put the lamp & the reflector at fl. of fresnel panel, then you get parallel light output.
Moving the lamp unit backward (> fl. of fresnel) the light beam start to condense! Keep moving it until the light beam just fit your objective lens.
Good luck.
Hi uvodee,
Please tell me what is wrong in my excel sheet, so maybe I can fix it if have enough knowledge, thank you.
