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Introduction:
Since Google launched it's VR cardboard last 2014.,i've read some good feedbacks about it.,And last May 2015.,the cardboard VR supports iOS.,Getting the VR cardboard is cheapest way to experience Virtual Reality.,And i asked myself can you DIY a complete functioning VR cardboard from recycled stuff.,Including the lens.That's how this project started.,And i'm sharing it here how to build a Google Cardboard VR all from scratch at no cost.,Using recyclable materials 
•(That is if you have have all the basic tools needed for this project.)

Step 1: Needed Things

Materials and Tools needed:
- Google Cardboard templates
- Scissors
- Exacto knife (stencil cutter)
- Glue
- Quick dry Epoxy
- *Transparent (clear) plastic bottle *
^made of (PET)
*stands for polyethylene terephthalate. PET (also known as PETE)*
-Syringe with needle
- Velcro or rubber band
- Glue stick (for glue gun)
-neodymium magnet(optional for older iphones)
*a smartphone(iOS & Android)
@ashu1pa<br>Yes-i tested it and it works on large screen smart phones.
@SpandanB3<br>as long as you used the biconvex lenses in the binoculars-i think it will work.
Is it work with 6 inch display
Will binocular lenses work as long as the focal lengths remain within range?
will a pair of 75mm magnifying lenses work? <br>
<p>All lenses, in theory, should work. Depending on the curvature of the lenses and the material its made of, you'll just need to adjust lens-to-screen distance and inter-lens distance until it gets comfy.. I used a pair small reading lenses (not glasses) with weak magnification. My lens-to-screen distance was pretty big (~50+ mm hahaha) but it cost me a dollar's worth. :D</p>
<p>Why cant you just use a pair of cheap reading glasses for the lenses? Something around +2 diopters, depending on your eyesight and the distance between your eyes and the screen. </p>
You need to have a focal distance of ~45mm according to the technical drawings distributed by Google. There is a very low amount of tolerance that the human eye can handle in this situation<br>( its approximately 1.5 - 2.2mm)<br>+2 diopters, if i had to guess, are around 300-450mm focal point. In lame man's terms... it aint gonna work<br>
<p>What diopters and focal point distance do I need for an 8.4 screen? Also, when using Google's calibration tool, much of my screen is letterboxed making it effectively much smaller than 8.4 inches.</p>
<p>The official google cardboard has a diopter of around 22-27. Diopters add in parrallel, or in otherwords you'd need ten 2 Diopter lenses to get a 22 diopter strength lens.</p>
@joshuac119<br>First,this DIY Lens for Google VR indeed worked.Did you tried it?.,i suggest you try it first before guessing a comment here.And 300 to 400 focal point is too far to make it work.,you just have to follow the cardboard guide placement where you suppose to put your lenses in to make it work.That i assure you it will.Actually i made two now using this method-and made another two cardboard VR and used two pairs of true biconvex lenses (2 lenses (25mm)from an old binoculars and 2 lenses using 50mm magnifying glass) and they all worked great.I suggest you make one and comment back here.
Your eyes will broke
@Vikas kumar 56<br>Yes,you can use your 75mm lenses,but i can imagine how big your VR would be.,I suggest you look for smaller lenses,you can get lenses on telescope toys.i made one using macdonald happy meal telescope toy that had two 25 mm lenses.
<p>Great instructable! Will be posting some photo's if I make it...</p>
<p>Can I use super glue, or maybe some other glue?</p>
<p>Sorry, didn't read the the steps right... never mind.</p>
<p>I finally made my own vr, but...I have double vision and sometimes its blurry...I'm using my iphone 5s...what did I do wrong?</p>
I suggest you use new empty plastic bottle cut in 25mm,and follow the steps.And use purified water to fill those home made lenses you made.,Double vision occurs when both lenses arent properly in correct focal distance with your phone screen.
<p>It's ok now, thanks. I went to Viewer Profile Generator to make my own qr code settings for my phone. Double vision is gone but the lenses are still blurry, I will have to make new set of lenses again per your advise if I have free time. :)</p>
Once you get the exact lenses &quot;focal distance&quot; you can use any phone size you want.,Bigger lenses are better than the standard lens size used in GCVR.
@S--0--S<br>you have to modify the google vr cardboard to fit your 50mm lenses on it.,and put it on a flat surface to get the correct &quot;Focal Distance&quot; between your lenses &amp; cp screen.(as i made it using E.V.A foam with 45mm lenses on it.
❤i only have a pair of magnifying lenses with 50mm diameter can i use them with my Samsung S3 ? and if i do what the distance between the screen and the lenses do you think?<br>thank you in advance..?
<p>eeeeeeeeerrrrrrrrrr how do i assemble !??!!! i have cut pieces but i have noo idea how to make pls help</p>
<p><a href="https://vr.google.com/cardboard/get-cardboard/" rel="nofollow">https://vr.google.com/cardboard/get-cardboard/</a></p><p>about 3/4 of the way down the page are downloadable instructions.</p>
Please any one tell me how to see a .zip file on an android smartphone
Xarchive download or es xpoler
<p>just download z-archive from google play stor</p>
https://play.google.com/store/apps/details?id=com.rarlab.rar
Guyz i found a way to get the lenses for about a dollar: http://www.ebay.ca/itm/291527857137<br>These are lenses made for vr and on ebay you can even buy whole kit for couple dollars
<p>hmm not the one im looking for :/</p>
<p>Thanks</p>
<p>it is awesome cool very nice but the phone is coming a little outside so can't close the cardborad</p>
Sir please send me the file to print arieff_adlan@ymail.com
scissors cut template sent
<p>It's difficult to cut the shape. but I'm enjoy making it even though I have no magnifying glass to work it .LOL</p>
Glad that you did it!,
<p>What diopters and focal point distance do I need for an 8.4 screen? Also, when using Google's calibration tool, much of my screen is letterboxed making it effectively much smaller than 8.4 inches. </p>
@HarleyM9<br>I'm not an optical expert to assist you with that.,but a good tip i suggest is to use a 45 to 50 mm magnifying glass to work with your tablet.,And using the googles cardboard lens holder part-modify it to fit your lens on it.,Have a side by side 3D image sample to work with as sample.Then locked your tablet using masking tape on a flat surface or table.,Use only the 2 lens attached on a frame and Aim your lens on your screen with SideBySide 3D image on it. until you get the correct focal distance between your screen and lens.
<p>what if you dont have a seringe?</p>
You mean SYRINGE!.,well it's up to you to decide -buy the real biconvex lenses or buy the syringe?whichever suits you best!,Or think of another way to fill those lenses you just made.Then comment back here!
<p>Is there a way to activate the camera and have fpv of whats happening in front of you, while wearing the enclosure?</p>
<p>Step 1: Take off GC</p><p>Step 2: Let eyes adjust to the light because lighting might be too bright.</p><p>Step 3: FPV is complete with interactive controls and realistic physics. </p>
XD. I was only wondering because it would be cool for something like thermal/night vision or live view vr. But still 69/10 answer would r8 again ;)
Yes,there is an app for that,you can google it.,activating the camera can be done too!,just put a slot underneath your VR to control your screen.,or if you own a VR with magnets that will work controlling your screen.,i dont use magnets for this project.
@socrtwo<br>Google CB VR was been updated to v.1.2 ,and i'm using my last DIY VR built 3 months ago-using true 45mm lenses on e.v.a foam.,better than default size on cardboard VR.
<p>I got lenses out of a pair of recent prescription though broken frame eye glasses of mine. I used a Google Cardboard VR viewer that we got from the NY Times 2 weeks ago or so. With just my lenses, the picture was blurry, however when I added the additional original Google Cardboard lenses the VR became crystal clear. The NY Times Google Cardboard materials are very expandable and easily accommodated the extra lense thickness. Of course the cardboard looks quite beat up now but everything is functioning brilliantly.</p>
<br><br><br><br><br><br><br><br>@Uk-Draken ,havent tried this.,i suggest you give this a shot-<br>http://3dvision-blog.com/1248-converting-2d-videos-to-3d-using-virtualdub-and-the-avisynth-script/
@ZeyneP1 that's cool.,you did it.,blurry?,i suggest use a new transparent plastic for the lenses and fill it with purified water.Less bubles means more clarity. :-)
<p>so really exciting, i did it &lt;3 </p><p>but it's a little blurry, and exhausts my eyes ehilr using with time.</p><p>after all, that's excellent, to make it on my own! </p><p>thank you so much &lt;3 </p>
<p>As I've mentioned on another thread; I have a couple of pairs of MyVu Video-glasses that I don't really use. Just thinking, if someone could work out a way to split the 3D video-file and send the two streams to the respective eye-screens, wouldn't that be the perfect VR or 3D viewer? The glasses are beautifully engineered and perfectly aligned so there's never any double-image effect.</p><p>I wonder if one of you guys could work out the electronics?</p>

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Bio: Electronics hobbyist and a DIYer and i love doing this stuff.
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