三月疯狂5美元家庭影院

121,二百四十八

四百零六

六十三

About: Random Weekend Projects

Just in time for March Madness!Here's how to convert your Laptop,智能手机,or Tablet into a makeshift projector.  It's really cheap,and can add a bit of creative fun to your next sports party!!

www.thekingofrandom.com

第一步:看视频!!



这个项目主要面向大学生,他们正在寻找一种方法将他们已经拥有的设备变成体育赛事或派对的投影仪。这比任何实际的东西都更新颖,but in my experience,图像是可观察的,希望这个想法会被欣赏。如果有什么,it's a party trick you can pull out for your next get-together with friends.

注:投影在墙上的图像将为“mirror image"or"水平翻转”from the original image.  This will make any text or numbers appear backward.  The light from the Laptop,智能手机或平板电脑是唯一的光源,so as the image is made bigger,the intensity of the light on the screen gets weaker until eventually the image becomes indiscernible.

第二步:你需要什么

Aside from already owning a Laptop,智能手机,或片剂,you're going to need 3 items to make this projector;;

  1. Cardboard
  2. 管道胶带
  3. Full-page Fresnel Lens

Cardboard:我在沃尔玛买了一个纸板箱。I just went into the photo-lab area and asked if they had any boxes I could use for a project.They had more than they cared to have!我选了一个几英尺长的,and the front face was just larger than my iPad.

磁带:For tape,我收到了黑鸭子胶带(也来自沃尔玛)。but even packing tape or masking tape can work just great!!

菲涅耳透镜:我在易趣上花了3.99美元找到了我的菲涅尔透镜。Since then,我看到它们的价格低到2.99美元。尺寸大约是8英寸X10”.These are typically used as full page magnifiers for reading small text.


第三步:切纸板

Ideally,we want a hole in the front of the box about 1/2"比镜头小。

I used the actual lens as a template to trace around the edges,then drew another rectangle 1/2"在第一个里面。我们要切出的就是这个内矩形,它应该留下1/2英寸ledge for us to tape the lens onto.

You can also use something like a credit card or hotel key to trace a rectangle in the center.

当一切都被切断时,你应该有一张照片上的留影,你可能想坚持下去。

Now you can use some tape to secure the lens on the inside of the box.

注:透镜的凹槽部分应朝向盒子内部,平整光滑的一面应朝外。

Step 4: Finished Projector and Variations for Laptops

When the lens is set,你可以把盒子关上以保持它的稳定性。Your Tablet or Smartphone will go inside and project outward through the lens.

我给了我一个快速粉刷的工作,让它变得更好一点,做了一个0.02英寸的投影屏嗨,撞击苯乙烯,我从一家标牌供应公司买的,价格刚刚超过2美元。它4英尺宽,黑色的管道胶带在塑料板上做了一个很好的边缘装饰。我只剩下足够多的胶带,把它贴在墙上,然后安装了一个家庭影院。

使用笔记本电脑时,this configuration will be too small.我发现在另一个盒子的背面可以挖一个洞,笔记本电脑倒过来滑到了合适的位置。这是迄今为止最快和最简单的设置,and the laptop gives the best results because the screen is the biggest and brightest!!

第5步:准备好视频!!

The image that gets projected on the screen will be flipped horizontal,上下颠倒。你可以转动你的平板电脑使它向上。smartphone or laptop upside down in the projector.

If you're using a tablet like an iPad,you'll also need to go into the settings menu and make sure to lock the rotation of the screen so that it's sideways.否则当你把它翻过来的时候,图像不会颠倒。

不管你用的是什么设备,你还需要把亮度调到最大,才能得到最大的光线。If your phone doesn't have an option to lock the screen,您可能需要下载应用程序。

To hold the device in the projector,you'll probably want to find something sturdy like a couple of text books,or a sturdy box.I used a box of tomato paste that was about the size of an iPad.

使用两根橡皮筋将设备固定在颠倒位置,it's now ready to go in the projector and play your movie!!

注:图像应该在正上方,but it will still be flipped horizontally.这意味着屏幕上的任何单词或数字仍然是向后的。

第六步:成功!!

I found that using a Laptop works the best,因为屏幕更大,and it can be turned up fairly brightly.  This is good because as the image is made bigger,屏幕上的光线强度减弱。50英寸的图像在笔记本电脑上非常容易观察到,以及一个iPad大小的平板电脑。当然,the closer your bring the projector to the screen,the smaller the image will be,但是它会变得更加明亮和集中。

I found that if you cover all your windows and close any doors to make sure the room is completely dark,this will help the image appear crisper and brighter.

因为菲涅耳透镜是平的,图像中存在一些光学缺陷。例如,中央对焦时,屏幕边缘可能有点模糊。要解决这个问题,可以在镜头上加一块遮光罩,中间有一个大约信用卡大小的矩形孔。大大提高了焦距。权衡的是,投影仪发出的光更少,所以屏幕上的图像将变暗。

智能手机的工作原理是一样的,但是屏幕尺寸不能超过20英寸or the image is unwatchable.  15"工作很好,“20”没关系。

第7步:结论

由于光的耗散降低了屏幕的亮度,it's more of a novelty than anything practical,but in my experience,the image is watchable and the idea will hopefully be enjoyed.

如果有的话,it's a party trick you can pull out for your next get-together with friends.

如果你还没看到视频,还不算太晚。看这里!!

如果你喜欢这个项目,也许你会喜欢我的其他项目。查看他们在www.thekingofrandom.com

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    63 Discussions

    没有
    米茨曼

    5年前介绍

    如果我在短距离内从镜子上反射图像,然后将图像通过透镜以固定水平旋转,会严重降低质量/亮度吗?或者有第二个镜头更好??

    没有

    我会在屏幕上使用反射式喷漆来增强镜面反射,从而增加感知亮度。I would use a 3m scotchlight product called 7210 Silver Reflective Liquid.在投影观看上,屏幕比任何东西都重要……仅仅使用白色屏幕就可以吸收大部分光能并使图像向不同方向偏转,从而降低亮度等。Good Luck!!

    没有

    my ipod wont put out an image through it why is this

    没有
    吉希尔

    5年前介绍

    How might you go about making the projection less blurry?不买真正的投影仪哈哈:)DIY很棒!!

    没有

    How long would you suggest the box be?我刚做了一个12英寸(可能)的盒子,肯定不够长,我的笔记本电脑。真了不起!!

    2个答复
    没有
    随机之王 智能机器人

    Reply 5 years ago on介绍

    谢谢,我很高兴你喜欢它!!

    12“worked fine for my laptop,but if you use an iPad or phone,你需要更长的时间。My box was probably about 2-1/2' long,我的媒体源定位在1-1/2“左右from the lens.

    没有
    智能机器人 随机之王

    Reply 5 years ago on介绍

    Hmm sorry its taken me so long to get back to you,我回家后会给它照张相。也许我做错了什么??

    没有
    ceaze21

    5年前介绍

    我刚从亚马逊获得了一笔5镜头的交易,只花了15美元!http://www.amazon.com/gp/product/b00b0hw99m

    1 reply
    没有
    随机之王 ceaze21

    Reply 5 years ago on介绍

    令人惊叹的!!

    I saw your comments on the video as well.Thanks for sharing the link,在你的项目和实验中都是最好的。)

    没有

    液晶显示器上有镜头片吗?I took one apart not long ago,想知道这张纸是不是在我拿出来的纸上…

    2个答复
    没有

    I made something similar,十五年前,用一台旧的CRT电视,a cardboard box,aluminum foil and a magnifying glass.在我整理的鬼屋里的剧院房间里,它工作得很好。我们甚至看到活着的死人在上面回来。如果你用铝箔把盒子的里面衬起来,你也许能得到更多的光输出。

    1 reply
    没有
    随机之王 cryptomaniac

    Reply 5 years ago on介绍

    Great suggestion!I'd thought about that,但没试过……but I think you're right.In a case like this,甚至比特帮助!谢谢你的评论!!

    没有

    液晶显示器上有镜头片吗?I took one apart not long ago,想知道这张纸是不是在我拿出来的纸上…

    没有

    我想知道放在镜子上的白色半透明面板是否会增加反射回观众的光线,使图像更清晰可见??

    没有
    斗牛迷

    5年前介绍

    I'm having trouble finding a properly sized styrene sheet for under $20 (with shipping) online and I'm not sure if there are any stores near me that sell them.Would poster board work at all??

    Thanks and awesome project!!

    1 reply
    没有
    随机之王 斗牛迷

    Reply 5 years ago on介绍

    哦,是的,哪怕是一堵白墙也行。It will be a bit blurry around the edges because of the optics of the Fresnel lens,但只要3美元就行了:)