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A projector to look at your phone from afar.

In the past year, home office made me stare at screens for too long and my eyesight didn't improve, so I built this dedicated picoprojector.

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I found a Full HD picoprojector module at Texas Instruments, and decided it was a solution to project the iPhone display on walls so I didn't have to stare at these small screens for too long.
With the help of a Raspberry Pi 4 and the RpiPlay project, I am able to make it work as an Airplay mirroring projector.

- In order for the Projector to work with the raspberry Pi 4, I followed all the instructions provided by TI on their website, the explanations are quite clear and it uses a standard RaspiOS to work, with some python packages to install.


- I also used the RPiPlay project which installs an Airplay Server on the raspberry Pi in order to mirror the iPhone's screen : The installation is pretty straightforward and I had to rotate the image 90° in order for it to fill the entire display area. 

https://github.com/FD-/RPiPlay

The lag between your actions on the phone and what is displayed on the projected image is quite acceptable for reading, and browsing images. I woudn't say so for videos or games.

  • Configuring the Airplay server

    hurðaskellir06/14/2021 at 20:56 0 comments

    The Raspberry Pi can be accessed either by wifi or ethernet depending on your needs and setup . 

    It is recommended to use ethernet but i find wifi acceptable with the airplay server I used . 

    For Airplay to work with the projector, I used the RPiPlay project. 

    You can find it here : 

    https://github.com/FD-/RPiPlay

    Use this command line to have all the optimisations during the compilation.

    cmake --DCMAKE_CXX_FLAGS="-O3" --DCMAKE_C_FLAGS="-O3" .. 

    I then used this command line to rotate the display and have it ready for the iphone : 

    ./rpiplay -n dlproj -vr rpi -r 90 

    which means the airplay server is named "dlproj" and its display is rotated by 90° . 

    Then you can just open your iphone (or iPad or even a mac) and use the display mirroring feature of it . 

  • Printing an enclosure

    hurðaskellir06/14/2021 at 20:45 0 comments

    I drew a 3D enclosure that I printed, that needs a lot of improvements, and I am a bit ashamed to share it at the moment, it needs some rework. sorry for that :-/

  • Putting all the elements together

    hurðaskellir06/14/2021 at 19:03 0 comments

    After some soldering and putting things together I get this : 

  • Using a single power supply

    hurðaskellir06/14/2021 at 19:00 0 comments

    The current assembly requires two power supplies : one for the raspberry Pi and one for the projector , both of 5V and 3A . 

    I have found in my spare things a 12V 3A power supply that will fit my needs. I just need a DC-DC converter to go from 12V 3A to 5V 6A . 

    I bought this one : 

    pi-shop.ch/5a-75w-dc-dc-module

  • assembling the Pico and the Raspberry Pi.

    hurðaskellir06/14/2021 at 13:10 0 comments

    Making the pico projector display Raspberry Pi's screen is just as easy as typing the required command provided by TI once the python package is unzipped : 

    just type : python3 ./init_parallel_mode.py
    And it should display the Raspberry Pi's content on your wall.

View all 5 project logs

  • 1
    Here is the summary of my build in a video :

View all instructions

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