mirror
the main reason im using a mirror is to make my projector more compact and to make the screen the right way around, my screen has a upside down feature but not reversed horizontal so i use my mirror to get the projected image the right way around, also u can shorten focal lengths to a degree and that depends on the thickness of the mirror, this however wont work with surface mirrors as they shine from the front not the back and therfore also using less light as the light doesnt need to go through a frontal peice of glass 2 times.
Trev
the main reason im using a mirror is to make my projector more compact and to make the screen the right way around, my screen has a upside down feature but not reversed horizontal so i use my mirror to get the projected image the right way around, also u can shorten focal lengths to a degree and that depends on the thickness of the mirror, this however wont work with surface mirrors as they shine from the front not the back and therfore also using less light as the light doesnt need to go through a frontal peice of glass 2 times.
Trev
off topic
hey guys i know this is abit off topic but if u realy want to put your projector to the test and realy want to show it off to your mates with great media and scare the **** out of yourself then go and buy the imax thrill ride dvd i can garentee u will not be disapointed, i got a copy from the net in divx format and um yeah scared the **** out of me lol also it has great info on filmaking, slides and digital graphics ect. Definatly a must!
Trev
hey guys i know this is abit off topic but if u realy want to put your projector to the test and realy want to show it off to your mates with great media and scare the **** out of yourself then go and buy the imax thrill ride dvd i can garentee u will not be disapointed, i got a copy from the net in divx format and um yeah scared the **** out of me lol also it has great info on filmaking, slides and digital graphics ect. Definatly a must!
Trev
ace3000_1
Would you mind taking a look at a new thread I posted? I thought you might have found it by now....but since you haven't I'm gonna ask you to visit for me 😉
http://www.diyaudio.com/forums/showthread.php?postid=174784#post174784
zardoz
Would you mind taking a look at a new thread I posted? I thought you might have found it by now....but since you haven't I'm gonna ask you to visit for me 😉
http://www.diyaudio.com/forums/showthread.php?postid=174784#post174784
zardoz
zardoz
heya there zardoz i went to that thread and i just posted a reply to it but it doesnt come back up on my screen saying i made the last post lol i dont know whats going on so ill reply to u in here just incase it doesnt work in the other, im realy sorry i didnt see your post as i was away from here for about 2weeks a week ago and maybe i missed it then, im not sure but i would be glad to help u out buddy and if u have msn messenger i would like to talk to u in that as we wont be filling up the forum with our conversation and its faster. The idea u have is very doable and would probally take u about an hour or so to do, all u need to do is solder a couple of wires with a relay that way u need no flip flop circut to make and the relay can handle higher currents and its only cheap. The realays in my projector in the design u saw i posted earlier is what powers my system and with the life span of 10million clicks u cant go wrong lol and mine works faultless not bad for $5 i could have done it for $2 as i bought 1 too manny relays lol anyway enough out of me.
trev
heya there zardoz i went to that thread and i just posted a reply to it but it doesnt come back up on my screen saying i made the last post lol i dont know whats going on so ill reply to u in here just incase it doesnt work in the other, im realy sorry i didnt see your post as i was away from here for about 2weeks a week ago and maybe i missed it then, im not sure but i would be glad to help u out buddy and if u have msn messenger i would like to talk to u in that as we wont be filling up the forum with our conversation and its faster. The idea u have is very doable and would probally take u about an hour or so to do, all u need to do is solder a couple of wires with a relay that way u need no flip flop circut to make and the relay can handle higher currents and its only cheap. The realays in my projector in the design u saw i posted earlier is what powers my system and with the life span of 10million clicks u cant go wrong lol and mine works faultless not bad for $5 i could have done it for $2 as i bought 1 too manny relays lol anyway enough out of me.
trev
light intensifying part 1
ok another one of my bright ideas here, ive been playing with my light in my diy projector and i have come to a couple of conclutions and mod's. Im just using my test light until i get a mini mh bulb that puts out 14000lm's and the test light as it stands now uses a 150w halogena lamp that puts out 2550lm's, there are 2 type's one is clear type and the other is frosted. First thing never use frosted as it will give u a fuzzy image as manny of u know with the loa's and secondly u can get high performance gain out of the clear type but run slightly warmer.In the pic u will see my test light, the brightness of the projected image im getting is about just a bit lower than a standard tv, now when i place a small magnifying glass infront of the light's burning arc wow u have just intensifed the light like 2 double the brightness, now my projected image is brighter than a standard tv about double of what it was before the mod. I know manny of u are using condenser lenses and they do basically the same thing, they control the beam and intensify the light, but if u use a small magnifying glass u are magnifying the light and controling the beam, in the pic it shows what i did and how i did it, just imagine putting a small mag glass infront of a condenser lens, any thoughts? i bet u would get a masive gain, i dont have a condenser as of yet but as soon as i get one ill try it for u guys.
Trev
ok another one of my bright ideas here, ive been playing with my light in my diy projector and i have come to a couple of conclutions and mod's. Im just using my test light until i get a mini mh bulb that puts out 14000lm's and the test light as it stands now uses a 150w halogena lamp that puts out 2550lm's, there are 2 type's one is clear type and the other is frosted. First thing never use frosted as it will give u a fuzzy image as manny of u know with the loa's and secondly u can get high performance gain out of the clear type but run slightly warmer.In the pic u will see my test light, the brightness of the projected image im getting is about just a bit lower than a standard tv, now when i place a small magnifying glass infront of the light's burning arc wow u have just intensifed the light like 2 double the brightness, now my projected image is brighter than a standard tv about double of what it was before the mod. I know manny of u are using condenser lenses and they do basically the same thing, they control the beam and intensify the light, but if u use a small magnifying glass u are magnifying the light and controling the beam, in the pic it shows what i did and how i did it, just imagine putting a small mag glass infront of a condenser lens, any thoughts? i bet u would get a masive gain, i dont have a condenser as of yet but as soon as i get one ill try it for u guys.
Trev
Attachments
light intensifying part 2
this is the second pic, sorry for the quality of the pics as its hard to take picks with a flash and not with a flash as the light is too dark with out flash and too bright with it. the white u see is from abit of some super glue ill get that off later, as i said just a test light the new one will be the same but cleaned up spotless, also i am using a half circle reflector, the best to use for this is a parabolic that i plan to get in the near future then all ill need is my mini mh! yeah lol
Trev
this is the second pic, sorry for the quality of the pics as its hard to take picks with a flash and not with a flash as the light is too dark with out flash and too bright with it. the white u see is from abit of some super glue ill get that off later, as i said just a test light the new one will be the same but cleaned up spotless, also i am using a half circle reflector, the best to use for this is a parabolic that i plan to get in the near future then all ill need is my mini mh! yeah lol
Trev
Attachments
light intensifying part 3
ok the final pic i painted the perspex cover flat black except where the lens is so only the light can come from the lens, i painted the inside of the cover black so that any light reflected from the lcd shines and relects back off of the perspex back into the lcd that way reusing the un used light, another thing im going to do is paint the inside of the light unit flat black and just have the parobolic reflector silver to stop stray rays from giving me light leaks out of the fan holes in the ends of the unit, it may not stop all but it will cut it down and uv to components and beleive it or not ir rays, black absorbs ir! thats why it gets hot!
I recomend trying experiments for yourself science is not always right and u can never see the diff unless u do it practical, so give this a go and lets see what u come up with
Trev
ok the final pic i painted the perspex cover flat black except where the lens is so only the light can come from the lens, i painted the inside of the cover black so that any light reflected from the lcd shines and relects back off of the perspex back into the lcd that way reusing the un used light, another thing im going to do is paint the inside of the light unit flat black and just have the parobolic reflector silver to stop stray rays from giving me light leaks out of the fan holes in the ends of the unit, it may not stop all but it will cut it down and uv to components and beleive it or not ir rays, black absorbs ir! thats why it gets hot!
I recomend trying experiments for yourself science is not always right and u can never see the diff unless u do it practical, so give this a go and lets see what u come up with
Trev
Attachments
Condenser Vs. Maginfying Glass
Hey Ace, let us know when you get your condenser lens. I'd love to see a comparision between the two as well as results when you use both. I've always used a condeser in my setup and I've never been able to believe peoples posted results if they don't use one. When I was testing my first design, the results without a condenser were just terrible.
Hey Ace, let us know when you get your condenser lens. I'd love to see a comparision between the two as well as results when you use both. I've always used a condeser in my setup and I've never been able to believe peoples posted results if they don't use one. When I was testing my first design, the results without a condenser were just terrible.
bitbyter
yeah i know what u mean and not to forget the light loss lol i think its a great idea what u said about condenser vs mag lens it will be interesting resaults, what id like to know is can we make that light brighter or more intense before the condenser to make our image brighter giving our light a whole lot more of effiency, i believe we can do it and i have proved in a way that u can make the light upto twice the brightness with a 6inch lcd, it works full no probs.
Trev
yeah i know what u mean and not to forget the light loss lol i think its a great idea what u said about condenser vs mag lens it will be interesting resaults, what id like to know is can we make that light brighter or more intense before the condenser to make our image brighter giving our light a whole lot more of effiency, i believe we can do it and i have proved in a way that u can make the light upto twice the brightness with a 6inch lcd, it works full no probs.
Trev
Here's a BIG MOMMA of an OHP:
http://www.gordon-instruments.com/literature/Overhead_Projectors_lit.pdf
http://www.gordon-instruments.com/literature/Overhead_Projectors_lit.pdf
fresnel lens affecting light output
Does anyone know how much light a fresnel lens will take away from a light source? I know that the fresnel lens will help direct and converge the light in to a single beam. But if the light source isnt that great, like from an LED, how will it affect it?
I had the crazy idea of using a RGBW setup. I know you all say it will take hundreds of LEDs.. I know LEDs are expensive but I dont want to have to deal with heat or loud fans. Cost isnt my concern at the moment, I didnt run out and buy a bunch of LEDs. I just want to discuss the therory right now.
If I were to to make 4 arrays of LEDs, lets say 100 LEDs each: R,G,B, and White, would individual fresnal lenses on each array help even out the spotty brightness before converging the lights into one? Or is this unnessary and redundant?
Does anyone know how much light a fresnel lens will take away from a light source? I know that the fresnel lens will help direct and converge the light in to a single beam. But if the light source isnt that great, like from an LED, how will it affect it?
I had the crazy idea of using a RGBW setup. I know you all say it will take hundreds of LEDs.. I know LEDs are expensive but I dont want to have to deal with heat or loud fans. Cost isnt my concern at the moment, I didnt run out and buy a bunch of LEDs. I just want to discuss the therory right now.
If I were to to make 4 arrays of LEDs, lets say 100 LEDs each: R,G,B, and White, would individual fresnal lenses on each array help even out the spotty brightness before converging the lights into one? Or is this unnessary and redundant?
There is a WEALTH of information about LED design in this forum....In fact this forum was started around LED's....Do a search on "LED" and you should find alot of good ideas and problems associated with LEDs.
well this is my finnished projector, what does every one think? sorry for not posting projected resalts as i havnt had the time but it would have to put out 300lm's as i can still watch it with a 100w bulb in the room going although washed out wich is normal but i can still see the pic no worries.
Trev
Trev
How much did you shell out for it altogether? I'm thinking you could get more than $150....maybe....it sure is pretty, but i think you have a low res lcd in it right?
property
i forked out about 260 i recon i coukld sell it for 500 and i got told by another 1000 so if i put it on ebay we will see lol u know how auctions go the price jumps up with biders
i forked out about 260 i recon i coukld sell it for 500 and i got told by another 1000 so if i put it on ebay we will see lol u know how auctions go the price jumps up with biders