Ok if you have been on this site for awhile you probably have seen my post about my portable DVD player Basically a zoombox of sorts with the DVD built in and the lil speaker I wanted something I could just plug in and throw Movie in and ka-ching I think I have all the parts and am ready to put it all together

7" portable DVD player....$35
MR16 12V 50Watt bulb... Free (first pics are 250 watt OHP now its a 12V 50Watt MR16)
lamp socket...............$3
Fresnels from OHP.............. Free Kinda (bought it years ago for like $80-100 did the projection panel thing
but I say free cuz it was laying around)
Fan from computer........ Free
Triplet from LL...............(Well I will be swapping this back and forth from my 15 til i decide how much i like
then prob buy one)
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Wood need to buy to make the enclosure
Misc screws brads and what not
probably will put some computer speaks connected to the headphone out jack for better sound output
Let me know what you think as far as things to do betterand what not.

currious to see how that light works ???
its frosted isnt it ?

nice use of spare parts .. why let them go to waste

Okay so couldnt wait any longer I snapped some pics with me holding the triplet and pushing the shutter on the camera I need to find better settings on my camera I forgot what I used on when I snapped pics for my 15" but you get the idea lots of light leaks the bulb was the brightest one I could find I did not want to use a ballast and I didnt have much luck with the CFL but I did not have any reflecting material plus I am trying to keep it small I was going to stick with my OHP bulb but 75HRS NO THANKS so that when I saw this bulb and thought hey it sure looks like a metal halide the Kelvin is only 2900 so not the best but small also for the bulb is 150W 2650 Lumens and 3000 Hrs of life and runs off straight 120V Wall middle pic no triplet others holding triplet and pushing camera

sdubb, do they make that kind of bulb clear without the frost? The arc is what must be projected onto the fresnels. BTW, what is the distance from the wall and the diagonal your getting?

here u go this should do it for you if you dont want a ballast

http://www.1000bulbs.com/product.php?product=33155

also the color temp is much better... and its 8900 lumens ... wow

Yeah they do and I looked all over for it but the only one I could find was a 60 Watt I know where you are going with the question Sim I just got it cuz it looked like a metal halide and it was just plug it in to the wall plus I thought for 5 bux its worth a try also thought maybe the white frost type stuff would help with the overall color I will get some dimensions tonight for ya when I get off work. As far as jeffek do you think that bulb could work I thought we were looking for a small arc type bulb I guess maybe if I put a reflector behind it kinda like a spot light style it could work anybody else think this could be a decent bulb to use.

The halogen tubes inside of those things is pretty short, too. Maybe you could find a 100 watt one?

As far as the clear ones I am only coming up with 60 watt Hmmmmmmmmm to bad that white frost is on the inside Hmmmmmmmmm i guess I could just break the shell and make a custom glass enclosure. Hmmm what to do what to do. is there anyway to swap shells or is that out of the ballaprk?

As Far as the diaganol I am not sure its basically 5 feet across and about 10 Feet away from the wall that my best guestimate as I took everything down as I have kids that like to break stuff If you know what I mean

I don't think you can just change the jacket and work with it. I beleive these bulbs are under a vacuum to prolong the life of the thin electrode otherwise they burn out quicker.


Then I'd say that the ratio of projecting is about the same since my 75+/- diagonal images were about from 13 feet away and yours at 10'.

Just out of curiosity, are you using a rear fresnel? If you can, remove it and just shine the frosted lamp onto the lcd with the field fresnel after the lcd. I would expect a bad hot spot to occur but possibly a better center image, maybe.

If it works then perhaps a sheet of diffuser between the lamp and the lcd to spread the light across evenly.

yes I am using a rear fres I just cut my OHP fres on a table saw I shall try it tonight and we shall see what happens I am thinkning I might just go back to my OHP bulb I am just unhappy with the 75 HRS its friday night so tonight will be testing night I will try the same bulb with a condensor I got from some slide projector see earlier topic for that I know nothing about condesors so lets just see what happens. that last pic is yesterday just me holding the triplet

yesterday pic

woohoo, more test's....

the popcorn comes after the test are all done plus I just won another portable DVD player on ebay for 20 bux looks like (twist my arm) I will be making another one boy I just cant control myself these lil ones are addicting but hey have you seen victor-eyd he has quite a few but nice ones mine is junk thrown together maybe somebody might want to buy this one i just won so I can spend time with the fam

I know how to keep you from making any more small projectors. Any more lcds that you end up buying you can send to me. Anyway, i will have some new pictures of my projector up in a little bit on my own thred. i just rearanged my room and i now have what may be the largest projection from a psone projector to date, 114" diagnal. Amazingly it is still fully watchable.

I hope you can get your test pictures up before LL goes down for the weekend. I am interested in what you can do with that bulb that you got.

**goes back to watching starwars on a projection that is 92" wide **

PS. i love your use of whatever you had on hand (realized that was a bad pun after i posted it) to test with. Might i sugest that if you can get your hands on some k-nex they are very useful for prototyping.

Well I probably wont these 2 boys of mine keep me busy I cant seem to get them to bed early and thats when the magic happens when the kids are asleep. But I shall try

did you manage to get your kids to go to bed? if not, duct tape does a great job of keeping things from moving...

Actually X i fell asleep before my kids I was out of it I am messing with the stuff right now looks like i most likely will not be using the OHP in fact I just blew both of them I must have wired it wrong but its just 2 wires so no testing with the OHP bulb kinda wanted to see it in action so back to the original bulb 150 watt halogena I can just barely see an image in my garage its afternoon so lots of sun shining in the garage no thats sad hopefully pics tonight

I might try to get one of those small 150 halogen work light double ended ones they look about the same as what I have without the frost white on it.............. we shall see

Anybody know why I blew the bulb I was just straight to bulb is there a special way did I just have them reversed both of them blew as soon as I plugged them in

Okay so I tried a few things out tonight the halogena bulb with a condesor I had didnt help put to much tried the idea Sim gave me no rear fres it was real bad so a No go there. I kinda got sick of fighting with the bulb so I think now I am just going to stick with the OHP style bulbs unless anybody else has a better option that requires no ballast and runs straight off the wall 120V point source I am trying to get some info on those bulbs people are using in OHP that have the reflector built in HRS Kelvin wiring and what not............

Sorry guys I am ditching this bulb it might be great for a psone style but didnt work how i wanted with my setup so back to square one

you really need to use a point light source, and have the rear fresnel concentrated to that point source.

Joe

What about the OHP bulbs I use? its a 300W 120v built in reflector. I have had great success with these in my Mini-Z and mini Haas builds.

Thanks TESCORP i was looking for something with better hours than 75 oh well I see that you dont sell these can you send me a link or give me the specs and exactly what I am looking for also are you buying the holders for them or are you riging something up.

Ok I think I might have something that will work for me as no tools or very little I should say and great ease of tweaking so you say you wanna see it............


Its a DVD holder I got from Big Lots for 20 bux I think this might just be a perfect home for my player. OF course everything will be pushed to the top but what do you think MOCK SETUP be kind I stuck the halogena bulb in it form the first post

oh yeah one lil side note bought some 5 bux computer speakers that will be mounted in the box and plugged into the headphone jack............... lil extra sound better than that lil 1" speaker (mono sound)

Well I bought this today for 19 bux the tripet says 330mm on it but what the heck is that little lens that swivels under it when i put it up it looks good when i put it down you can see the fres rings anybody have any ifo for me. Hmmm what to do with this thing I need to stay away from this site I just keep buying more and more things...............

Were you trying to use the 82v bulbs? Alot of OHP bulbs run in 82v, so if you try and feed it 120v you'll overheat and eventually blow them. You need a diode (rectifier) that comes with the OHP in order to convert your voltage. That may be what was causing your bulbs to blow up.

If you are looking for the small halogen worklights w/ballast etc, I would go with one of the standard halogen floor lamps. You can find one that someone wants to throw away cuz the bulb blew, take out the wiring/electronics (especially the dimmer) and just buy a new bulb for a few dollars. Then you have a projector with variable brightness! I wanted to do that before, but due to the amount of heat they give off, you really need to get the heat glass and ventilate/cool your box really really well. Good luck with the rest of your build! Hope you can salvage that new OHP you got!

Nice find on the 330mm lens sdubb. Couple this with a 330mm fresnel and I bet it would look tight! Not sure what the lower lens is for probably a filter of some sort which I've seen on others but yours looks spherical.

LOL, you have been assimulated.

Yeah it is spherical just looks like a singlet of some sorts. But thanks for the info well all this stupid lighting trial and error is driving me crazy Let me ask this. I have the big ol core coil ballast thing thats 250 watt (somebody gave me 2 250 and 1 400) can i pare this with those small lil metal halide bulbs like you have basically if its a metal halide ballast and the wattage is the same am I good to go or not ???

That's a flip-in magnifier lens. 1.3X I think.
Makes the image bigger. (changes the focal length)

Tgreenwood

ok still trying to figure out a decent light I know I know just use the OHP bulbs well 175hrs come on we can find something just as cheap and just as good but more hours cant we (i hope so) well what do you think of this

http://www.lightbulbsdirect.com/page/001/P.../Q250GY6.35120V

small, 250 watt 120 volts no ballast

anybody in the lighting specialty feild?????

Maybe I just need to go back to the CFL and shove 4 in there with the reflective stuff.

400w FDA Bulb (200 hours)
400w Mini Cand Bulb (2000 hours)
300w DRA/5 Bulb (300 hours @ 125v, 500+ hours @ 120v)
250w ELC/5 Bulb (500 Hours @ 125v, 850+ Hours @ 120v)

There are a few more options if you're sticking with the 120v. It looks like that 2000 hour
bulb would be nice to use, but not sure how much of a point light source it would be.

Ok still trying to find a decent cheap light source I do have a 250 watt metal halide ballast (FREE) with mogul what is the smallest bulb size i could get to use with my 250 watt ballast as I am trying to keep it enclosed in that dvd holder thing??? or are those 250 bulbs just as big as the 400 bulbs are the double ended ones any smaller. Is 250 metal halide to much for this small portable dvd ?? Thanks

What ANSI code is the ballast? The double-enders only work on an electronic or M80 ballast.

Its probably M59 but I am not sure I shall find out when I get off work it looks like my 400 watt big old klunky ballast I could just barley read that it was 250 I will see if I can read any other information off it.

If it is M59, then it is 400w. 250w would be M58 (probe start), M138 (pulse start) or M80 (double-ended hmi).

Ok I think I might just go with this bulb as it should work with my ballast (hopefully they work have no way to test) I will just get the 65K one and hopefully make it fit. My only real concern is that the arc on that bulb is pretty big and if we want a point light source I cant see how this can be a point light source with that big arc shining on a 7" panel or am I wrong?????????? Let me know.

oops here is the link http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...em=320155327986

Ok this as much info as i could read off the torn and tattered paper on it M57 H39 got any info for me sensibull

M57 indicates that that is a 175Watt ballast.

Here are a few ANSI codes:

M57 = 175W
M58 = 250W
M59 = 400W

Oh, and H39 is the ANSI code for it as a 175W Mercury Vapor ballast.

That would be a 175watt MH and you can get cheap medium base bulb for less than 20$ the bulbs will be anywhere from 3000K to 4200K and you can use a standard 120v light bulb base if it is made of ceramic. one of the kind that you can get in any hardware store, it will be around 5$. so for about 25$ you will have a light system that will be good for what you are testing with much more lumens at the screen with a much longer life to the bulb

Okay still trying to get all the info off this thing and thanks guys for the help I see that it looks like 250 watt is the max but it is actually 175 so you guys are coorect there also on the paper it says universal cat no. 1130-91 and then i cant read the rest of it as its ripped off. So this might be even better as I can get a 175 watt bulb keeping my enclosure small So guys help me out does all this look right and is there a good 175 watt bulb out there with good color??


Oh yeah I screwed my 400 watt bulb into the base and it worked fine so I dont know what the difference is between M59 and M57 is the M59 just deeper but has the same threads and stuff?????

A mogal base is the same size for all bulbs that are built to those specs. 175 w and lower wattage bulbs that are single ended can be either a mogal or a medium base medium base is the same size as a standard filimate house bulb.


It sounds to me like you have a mogal base This is a good bulb for a mogal and it has a 5200K http://www.plantlightinghydroponics.com/17...-c-375_435.html It is at the bottom of the page. It cost 40$ plus shipping.

If you are just experimenting I would go with a 175w that is in the 4000K range for under 20$

Wouldnt this be a better bulb its cheaper better color and better shape???

http://cgi.ebay.com/175-W-6500k-10k-20k-14...1QQcmdZViewItem

The ballast says 250 watt max on the lamp, You can run a 250 watt bulb on a 175 ballast???

No wonder why your poor burning money like its going out of style!

Looks like my bro is finally getting back into LL now that he is having a house built he wants to optimize his projector "Why do lil bros always have to copy the older bros?"

Okay so I have been slacking but with NO tools and 2 little boys Never have much time to get anything done So here is what I did yesterday I know its not much but hey every little bit counts. Still have to put a front and back on it and the fres wire it all up you know yada yada yada.............if you have suggestiosn please post I have it pretty much how it needs to be all squared away but an info helps.

Okay now I am really lost I just cut my OHP fres down (and split them apart) and I am measuring them I am coming up with 430 and 450 does this even sound right??? The triplet on the OHP is 330 anybody wanna help me out I amn lost .............

It is best to use the sun as a collimated light source, and measure the distance from fresnel to surface when you get the smallest possible point of light. You would want the grooved side of the lens facing the ground. If you use a light bulb, the light is not collimated, but diverging, which will give you longer FL measurements than you should get.

Actually, the groove side facing the sun and the smooth side facing the ground.