How to make a led projector from old tablet PC

How to make a led projector from old tablet PC


Today I’ll show how to make multimedia projector from the old tablet. The basic idea was to make a projection in the form of an old camera in steampunk style and do not spend money on the project. The basis of the old I took the tablet, where the touch sensor is working poorly, and that is just a couple of minutes working on the battery. Since the projector to do – say goodbye to the tablet. 50% chance that you will break it in the process of dismantling or projector construction. Before starting to disassemble the tablet – turn it on and make sure it works. TIP: Before disassembling install all the necessary software, especially remote control sowt, for example teamviewer. TIP: Turn off automatic screen coup and install the software for the screen forced coup. I also needed a lens and light emitting diodes (much). Getting tablet disassembly. Remove the plastic front and unscrew the screws, in many models of tablets can skip this step, as they have no mounting screws . Remove the back cover using the old credit card. Note the location of the Flex ribbon cable. Disconnect the battery cable and carefully peel off the battery, not to damage it.
Attention at the damage the battery can catch fire or even explode! TIP: If you want to replace the batteries with new – save the controller, and solder only the battery. Schematic diagram of the projector: Light Source, screen and lens. We continue to disassemble the tablet. Gently disable cables from the main board. TIP: Take a picture of the location of the loops before dismantling, then it will be easier to assemble;-) ATTENTION! Unscrew the screws that hold the main board. CAREFULLY raise a main board, and see what is soldered to it! Gently peel off the mounting parts (speaker, microphone, camera, vibration, sensors). Remove the screen and hide it in a bag to avoid scratching or dusty. Carefully remove the touch sensor, it is very fragile, and hide it in a bag to avoid scratching or dusty. Connecting the screen and check the possible relative positioning of the screen and the main board. It depends on the location of these components in the projector and the form the projector. Mark up the mounting dimensions and making plastic coasters fee. I made out of old marker pens. The case I have gathered from a plywood box of tangerines. Temporary case for gather tests on hot polymer glue . IMPORTANT! In the final assembly polymer glue can not be used. LEDs are heated and can melt it! The screen should be positioned to face the light source otherwise the image will be a mirror! Carefully dismantle the screen block in the screen itself and the lenses and LED panel. If the LED backlight is soldered to the main flex cables – carefully cut the wires backlight. Now the most interesting – polarizing film. It is dark and strongly adhered to the screen. Very gently pry the knife edge. Do not pull up! The film is easily broken! I peel off the film with the help of paper, slightly raised – slipped paper. Disassembly is complete – it is necessary to test the functionality of the device and make sure how a polarizing film. When correctly positioned image with normal colors, the reverse – the colors are inverted in the negative. Two options with no visible effects. Since I was planning the project as a stylish vintage decor elements designed in the form of retro camera – then the next step was the production of photographic bellows. First training on plain paper, and then the final version of thick black paper. I took a black paper for pastels. Then I make a light source. The main task – how to evenly distribute the light sources across the lamp area.
Note, the source of the LED strip me enough to test only works, for normal functioning of the LEDs need much stronger!
I have ordered them in China, the price will be about $ 10. In the following video, I’ll show them. ATTENTION! LEDs strongly heated when operating at full load, so you need to make a forced cooling. I perfectly approached the fan and heatsink on the old video card. TIP: Make lamp stand-alone to be mounted on a tripod! It perfectly soft box for video and photography. At the final assembly of the body of plywood I used PVA glue and cloth for fixing elements of the case. The lens I made from tin cans of olives and lenses. I have a basic lens – 10x macro head for 58mm lenses, worth about $ 3 in China. But you can choose from existing in homes. Polarizing film, I did not cut it, and for polarization used a polarizing filter for lenses with 58mm thread which is has wound to the main lens. TIP: Make sure to install the correct polarization filter, before the final lens gathering. The next stage is quite complicated, setting the touch sensor and the lengthening of the Flex cables. Flex sensor is very short, to extend it fit the old ribbon cable from the drive. After cutting the loop is easy to clean contacts for soldering with a diamond drill and needle files. Further, simple;-) Carefully divided, solder and insulate each wiring. TIP: Record the loop resistance between the contacts, then it will be easier to check the quality of the soldering loop. TIP: When installing the sensor in the housing, ensure the correct orientation of the sensor, or the sensor will be work in mirror mode. TIP: Flex is best done with a longer reserve to placed it along the body. Final: The projector is running, but want a more vivid picture. I look forward to more powerful LEDs. LAST TIP: In the process of construction, check availability tablet, if it stopped working – I congratulate, the projector over the building for you;-)


  • Valdemar Fishmen

    February 18, 2017

    ASK: why you remove polarizing film?

    I turned the screen and illuminated front. It is necessary to projected onto The image did not have a mirror. Therefore, polarizing film provided between the screen and the light source. I wanted to be able projected onto a negative image, because it is much brighter.

  • Valdemar Fishmen

    February 18, 2017

    ASK: you shift film in projection lens?

    Yes polarizing film (filter) is set after the lens. I think that because it turns out most brightly.

  • Valdemar Fishmen

    February 18, 2017

    ASK: how about the brightness of this projection videos?

    With this set of LEDs got dull! We need complete darkness to see the image. It is enough to make sure that everything is working. So I'll do a more powerful set of LEDs.

  • Valdemar Fishmen

    February 18, 2017

    ASK: What will be on homemade product videos next?

    I want to make a mini portable smoke machine to the subject of photography.
    I will begin to do once it attains 100,000 views video or 1,000 likes.

    example foto

  • Wayne Evans

    March 14, 2017

    ok…pretty impressive video, but honestly i was expecting to see better brighter results from this unique approach.

  • Mosfet Fouad

    March 17, 2017

    goood solution

  • Vormix Tv

    May 15, 2017

    I want to make a projector from 7inch tablet but please can you tell me that which led panel should I use . and if I double magnifying lens will it work I first made a very small projector from mobile watch

  • Khushal Suthar

    May 24, 2017

    very poor work

  • Ra Vee

    June 17, 2017

    I'd buy a cheap Chinese projector and and increase the power of backlit led..problem solved..:)))

  • Heendu Sheetskin

    July 3, 2017

    why breathing onto the mic? you eating the mic while talking?

  • HaLuNkE ST0NER

    August 11, 2017

    Pls put a little foam or damping material over your microphone, theres a lot of bad noise in this vid. Thanks for the great idea

  • nick name

    September 12, 2017

    !!WARNING!! not for kids!! LOL!!!

  • Mohammad Tajuddin 009

    October 12, 2017

    R u drunk baby…😂😂

  • WKH Ray

    October 13, 2017

    Go to some website to learn more and soon you will be great?

  • pierre jean

    October 19, 2017


  • Ryuuken24

    December 7, 2017

    Using a tablet is bad, not enough pixel separation. Chinese projectors are like this but, cheaper and better lcd used.

  • kutu kepik

    December 9, 2017

    The screen is flipped for mirrorless projection

  • Khan Bhai

    December 28, 2017

    Great Work Sir
    👍thumbs-up for little angel for providing cute background voice 😍

  • saif hacks TIPS AND TRICKS

    January 17, 2018


  • Kma Jaleel Mohamed Kodenchery

    January 19, 2018

    No need to remoove pol:film,

  • Patrick Jerome Obaldo

    March 15, 2018

    Voice Changer detected.

  • Troy Janus

    March 26, 2018

    Please speak clearly….

  • pussy cat

    April 5, 2018

    This idiot is using 3d pen instead of glue gun 😂😂😂😂

  • Ura Nium

    April 16, 2018

    Why is the voice so spooky.

  • Iris Pecks

    June 26, 2018


  • Satish Pawade

    July 4, 2018

    This video is nice but name is not given which part is used

  • Nempal Bhanwal

    July 7, 2018


  • Nasir Khan

    October 18, 2018

    OMG… I m having terrible headache after "listing" this video…

  • RnL MaXXa

    October 22, 2018

    great work buddy


    November 2, 2018

    He is a hacker

  • ᙜHRꞓżå

    November 19, 2018

    What are you doing and what you are saying only you understand. This video made for wasting time.

  • Mohammad Mehad

    December 9, 2018


  • Ttech Creative

    December 27, 2018

    Mother fucker ur voice iritating me its harrashing me

  • Andy Tipping

    January 1, 2019

    think id rather watch it in your native language – your engish sucks – big time better watched with the sound off

  • binish sebastian

    February 10, 2019

    It is better to buy a new one

  • van khai TV

    March 5, 2019

    Great to use how many leds w

  • Pablo Eskobaro

    March 8, 2019

    this video would be better if this kid's voice would be muted


    March 13, 2019

    Add fresnel lens

  • DeHbih

    March 16, 2019

    Pleas make something with this voice, i see you use your children instead of your voice… you are bullshit 🙂

  • The Flash

    March 22, 2019

    Good work


    April 11, 2019

    Taj Hotel ki full Jankari Hum kaise banaye projector mein full Hindi mein Bataye

  • Rosanjali world

    April 18, 2019

    Outstanding 😊

  • Данич семенов

    July 13, 2019

    Маленький гений! Такое решение с поляризатором хорошее.


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