As some of you may know my wife has been battling Chron's for sometime now. Needless to say, I haven't had anytime for this Project. I hope this makes up for the long delay and please, if you don't mind keep my wife in your prayers. Enjoy![size=7]

Psone Projector Plan

Wow, great job.
Very good plans.

I wish your wife all the best. I have had two friends with Chrons, they battled it with many ups and downs, but came through. Keep the faith, you guys will be aok

Thanks it means alot. I never thought of this plan as "complete" so please feel free to ask.

wow man sry bout your troubles. for some reasn tho the link takes me to yahoo only. but i remember your results before and they were well thought out

Hi,

I have been following this design for a while, thanks for sharing.

As for Chron's my farther has it and i have seen what it does to him, Although his was aggrivated by stress and he has since retired, it seems that it wont go away. So being his son i am esp interested in what is happing with this.

All the best to you and your wife. I am not a religious person but i will say i silent prayer for you.

CHris

{edit} the link is broken for me as well.

Thanks for the kind words and prayer. Sorry about the link, give it a try now.

tried the link but did not work.

Edit two minutes later: works now...

I tried yesterday and tonight on two different PC's and it doesnt work for me either.

Wardog

i cant download it at all i get to where it says psonefinal and it wont download weird huh?

edit nm it just took a min to actually open in adobe. great job man

To all that are looking - IT is a LARGE FILE - it will take a while for Yahoo to UPLOAD it to your adobe reader.

BE PATIENT - it's like a 6MB file!

Back to your reguarly scheduled chat...........

Got it.

Very nice job with the guide.

Im going to be looking around for a few things and then Im off to do my own based a lot on your plans.

Thanx and best wishes to your Wife.

Wardog

it says folder is empty

Same here - anyone get the plans?

Yea someone might consider hosting the file from their webspace or from LL.

I'll host it. Give me a few and I'll post up the link.

http://www.ihuffster.com/other/psone.pdf

Right click > Save Target As

I've read over these plans and maybe I missed it but where is the lexan or tempered glass in this setup?

I've never seen the tempered glass in small projectors, only in the larger ones....

mydiazclan,

eventhough I am not going to build one of these since I have a 17" pro pj, I have to complement the work you have done.

Great job on the detail instructions in the guide also.

goodluck and my prayers to your family.

thx
fw

Thanks Guys! My wife goes back into surgery June 6th. Prayers appreciated.

was wondering what conector are on the back of the lcd as i have bought the compotition pro psone lcd and it has these on the back

Click to view attachment

From Left to Right in the above picture:

Headphones / Power / PSone Console / Audio Left channel / Audio Right Channel / Video

I like that setup because you don't need one of the special cable for breaking
the red/white/yellow down to a mini-din headphone style adapter like on the
back of the standard psone screen from Sony. Plus it will save you time and
soldering when you hook that up to the plate connector if you go with the
plans in this post.

If anyone else has built this project (currently i have the box made but haven't put the parts in it) should there be any concern over the focal lenghts and distances given if you're using the ohp fresnels? I'm just worried about focusing on the front side.

Yes, you should figure out what the focal lengths are and set the distances between bulb-fresnel and fresnel-triplet accordingly. These distances don't need to be exact, but you will get better results if you distance things properly. I would recommend using the LumenLab Focal Calc II by Dazzla to figure out what distance your triplet should be from your field fresnel.

Ideally, the light cone produced by the field fresnel will not 'spill' out of your projection lens. This ensures maximum brightness (no lost light) and focus.

Hope this helps.

Dave

I never could figure out the proper focal length on these ohp fresnels since they're like 2 fresnels in one. I was hoping mydiazclan would shed some light on the ohp components he used. I have a feeling I'll end up with a threaded focus.

I guess normally I would try to see at what distance from the lens light shone through it collects to a point to determine the focal length. I have never heard of a lens that has essentially 2 fresnels combined to act as a condensor and a field lens in one, though I can't see why it wouldn't be possible.

If the OHP uses such a lens then I think there may be only 1 (easy) way to figure out what the focal lengths are...

Measure the distances used by the OHP manufacturer. The distance to the lens from the bulb should be the focal length of the condensor part of the lens.

Now, place say, a flashlight, at that distance to the condensor side of the OHP lens and project the flashlight onto a wall. Move the lens+flashlight closer/farther to the wall until the smallest area of light is shone, this distance should be the field focal length.

I hope I'm not completely off base here..

Dave

Dave, I get what you're saying. I had tried the sunlight method to no avail. It's one peice of acrylic with rings on both sides. I'll go back and review my own measurements from my first plog where I used this for a different kind of psone pj. the condenser side will probably be ok but I'm not so certain about the field side. Maybe I can just build an attachment focus housing that clips on or something if the FL is too long on that end. Thanks for your comments.

One more thought... Using this OHP lens is equivalent to an un-split fresnel's setup soo...

The distance from the OHP lens to the projection triplet is not necessary to know... Well, it is but what's important in an unsplit setup is that the triplet is able to focus on the LCD. So what matters is the distance from the LCD to the triplet.

The focal length of the field lens does matter (for FOV issues), however, if you don't plan on changing your triplet, all you can do is try the PJ with the LCD - triplet distance set, and hope you don't have any FOV issues. If you don't, then it would would show that the field focal length is reasonably close the focal length of your triplet. However, if you have all kinds of spillage around the triplet, you know the focal lengths don't match very well.

Does this make sense? Hope so.

Dave

i believe that most ohp fresnel are 330's or maybe 220 one side and 330 on the other. Are they marked which side is up? If not i would bet that they are 330's

I was thinnking the 330/220 thing also. I think most are pretty close. What's tough to factor in is that the field side on an ohp (specifically the 3M 9200 I ripped up) had an adjustable arm for focusing. I looked back and found that the lamp side of the fresnel was 12.5" and the field side was 18". This makes it 317.5 mm on the lamp side and 457.2mm on the field side. this was measured using a transparency in full focus from about 18ft away from the wall. 18 feet = 18 inch fl I suppose.

somebody could me the psone projector plans to my email? please

abal04@gmail.com

I'm no expert by any means, but I've taken apart my fair share of Ohp (much to my wife's dismay) Generally, most I've found are 330/330. An inch from the unsplit fresnel seems to ensure that no fresnel rings are visible. I have come accross some great fresnels from Dukane which are single pieces of 330/220 (grooved on both sides).

P.S - if your looking for the PDF - Member Loogie was very kind in hosting a link on the first page, just look for his post.

yes. thx Loogie! i just dl'd it today as well. not totally sure i'll use it, but i'm sure it'll be informative. i'd like to build a "mini" for my church youth group to use. will need to be kinda sturdy and flexible on the av connections

I can't seem to find the instructions through the link in the first post. Looks like they have been removed from the site. Would someone please email them to me?

cmacmillanhr@yahoo.com

Thanks. I'll hopefully have an LCD from a broken DVD player soon and be able to start working on this.

I could even rehost the PDF if anyone can send it to me.