Picture of Make a cheap 3$ Projector
I'm gonna show you how to make your own 3$ Projector with things that you probably already have. Its cool for you to watch your photos and movies and it's portable so you can take it anywhere.

To make your own 3$ Projector, you will need:

1 - Magnifying Glass
2 - Hot Glue
3 - Cutting Tool
4 - Box(any kind of box will work, i'm using a Cardboard Box)

It's not as good as a real 200$ Projector but its good for a 3$ Projector...    : )
If you liked this Project vote on it, in the Camera & Photo Skills Challenge and in the Green Living & Technology Chalenge! Thanks

Step 1: Preparing the Magnifying Glass

Picture of Preparing the Magnifying Glass
Remove the Magnifying Glass from it's casing until you only have the Magnifying Glass itself. Use a plier or something like that to remove the case. You can also use others Magnifying Glasses to make this projector.

(If you need help, see the photos or comment)


Can anyone please tell me the glass power or pecular magnification glass type.I have bought a 4x magnification glass with 60mm wide and does as per the instructions,but only a blur image exactly there is only a blurred form of light and if i do with 6x glass with 2.2 cm radius i can see it only a small image.NOTE the the both lens comes on the handle of the same as a combo.Please someone help me to sort out,what is the problem.

jmagana59 months ago
had to figure a way with the small box and magnifying glass I had, but I impressed with a "first try"
JamaicaM jmagana55 months ago

what kind of magnifying glass did you use?

jmagana5 JamaicaM5 months ago
a standard glass from a set of "helping hands"
JamaicaM5 months ago

I tried this but I only get a white light image. I tried focusing back and forth but nothing happens. What magnifying glass did you use? I think it's the problem. When I first tried it, I use my moms eye glasses (which is concave obviously) and I see some flipped blurry image with colors slightly visible so I thought It would really work If I buy a real magnifying glass but It does not work so I'm thinking that the magnifying glass needed should be concave.

asmith2557 months ago
Can I play games while projecting

While your phone is inside a box?

HEY!!!! I KNOW YOU, you're from that you tube channel called house hold hacker
karibone1242 years ago
How do you do that with the accelerometer?
bill81882 years ago
Been looking for a long time can't wait Tory thx
toasty872 years ago
Credit the source of your content.  This is quite obviously stolen.
(CIA)3 years ago
i tried this project a hundred time but it does not work I am sure I follow your structure step by step but the result was like a normal torch please help because I am so interested>>>
anther question is if I want use a mirror to improve the quality should I use a normal mirror or a Convex mirror or .....?????
thanks so much
guneysu3 years ago
if i wanted to use my laptop, would this system work? assuming that i used a box big enough to put my laptop in. and maybe a bigger magnifying glass.
talk to me on this web site
looks great thanks
tinker2343 years ago
i wonder if i add a bulb if it will be brighter
rr43 years ago
I tried this projector with a condenser lens {picked from a film still camera} ,so that i get a small and dim image
ZoDo3 years ago
Interesting project, but don't you need to focus the image? Does it come out clear enough? How big is the image and how far can you project it?
DuarteLucax (author)  ZoDo3 years ago
To focus the image I simply move the box(projector) forward, or backwards. If you put the box to far from the wall, the image will get a little bit bigger but blurred. The image is a little bit dark compared to a real projector, but for 3$ what could we ask more? Thanks
Worth going tothe dollar store just to get a couple of cheap lenses. Wonderif two lenses will get the image without inverting it....
dfaria3 years ago
I'm going to try this one!
k2y093 years ago
WoW I'm going to make this instructable it looks so cool !!! ; - )
rimar20004 years ago
You need a mirror in order to put the image in normal mode. Otherwise you can't read texts as you do, left to right. Anyway, good try!
DuarteLucax (author)  rimar20004 years ago
Yes, you're right. I tried to see a text and the words were backwards. I didn't even know that because i just use the projector to see photos and movies without subtitles. But still is good to watch photos and small movies(without subtitles). Thanks for the comment!
etlerd4 years ago
So...many projector projects specify fresnel lenses and other complicated bits. Why doesn't this project need those?
DuarteLucax (author)  etlerd4 years ago
Because this is just going to amplify the light(photo/movie) from the LCD of your cellphone into the wall. It's not real Projector.
DuarteLucax (author) 4 years ago
If you liked this Project vote on it, in the 'Camera & Photo Skills Challenge' and in the 'Green Living & Technology Chalenge'! Thanks
zazenergy4 years ago
ha! fun! how does the image look?
DuarteLucax (author)  zazenergy4 years ago
The image isn't that bad for a 3$ Projector, you can only see it with the lights off but still is fun the watch movies & photos. The image is a little bit more darker than a real 200$ Projector.
arredamento4 years ago
very interesting concept and idea, good share!
DuarteLucax (author)  arredamento4 years ago
Thanks, it's not as good as a real Projector but its fun to watch movies & photos.