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DJI HDMI Module vs Tablet with HDMI

Discussion in 'FPV (First Person View)' started by jjpetroski, Jun 28, 2016.

  1. jjpetroski

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    Is there a quality difference between the HDMI outputs? There's a cheap tablet at Walmart for $80 with HDMI output on it. Figured I'd save $10-15, but also get use of the tablet too.

    Also: Obviously if the USB came undone the FPV view would be lost to the HDMI output on the tablet, but what happens with the DJI controller since there's a separate connection on it for the HDMI and USB? Would you lose video connectivity then?

    If running Litchi and you've programmed in Waypoints would it come home or continue the programmed mission if the controller's connection were lost?
     
  2. alokbhargava

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    Try your luck, I doubt if the cheap tablet can process USB stream and also generate HDMI output simultaneously with 720P.

    USB and HDMI ports on RC are two independent ports and both work simultaneously. Telemetry is different on these outputs.

    Once mission is loaded on AC, it doesn't depend on RC connection. RC connection is needed just to display the position of aircraft or the cam view.
     
  3. RadRich

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    I think it's down to $49.98 now. Is this the one you're looking at OP? Ematic 8" Tablet 8GB Dual Core Core - Walmart.com

    [​IMG]
    Ematic Pro with WiFi 8" Touchscreen Tablet PC:

    Technical Specifications:

    • 1.6GHz ARMv7 dual-core processor
    • 1GB DDR2 of system memory
    • 8" touchscreen, 1024 x 768 resolution
    • Built-in 802.11a/b/g/n WiFi
    Additional Features:
    • Back 1.9MP webcam and front 0.3MP webcam
    • USB 2.0 port, MiniHDMI port, headphone jack
    • 8GB on-board storage memory, additional memory via microSD card slot<
    • Gyroscope
    • Up to 10hours of run time on a full charge
    • Weighs 1.05 lbs; 7.91" x 6.06" x 0.40" dimensions
    Software and Applications:
    • Android 4.1 OS (Jelly Bean)
    • Calculator, Calendar, Camera, Chrome, Clock, Downloads, Email, Evernote, Explorer, Gmail, Google, Google , Kingsoft Office, Local, Maps, Messenger, People
    • Play Books, Play Magazines, Play Movies & TV, Play Music, Play Store, Pogoplug, Settings, Sound Recorder, Talk, Video
    What's in the Box:
    • Tablet and AC adapter
     
  4. RadRich

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    Doesn't look too bad, especially for the price.

    Here's the specs on my Shield K1, for comparison (and $150 more o_O):

    • PROCESSOR: NVIDIA┬« Tegra┬« K1 192 core Kepler GPU 2.2 GHz ARM Cortex A15 CPU with 2 GB RAM
    • DISPLAY: 8-inch 1920x1200 multi-touch, Full-HD displayVIDEO FEATURES4K Ultra-HD Ready
    • AUDIO: Front facing stereo speakers with built-in microphone
    • STORAGE: *16 GB *Portion of storage occupied by system software.
    • WIRELESS: 802.11n 2x2 MIMO 2.4 GHz and 5 GHz Wi-Fi, Bluetooth 4.0 LE, GPS / GLONASS
    • INTERFACES: Mini-HDMI with HDCP 1.4 output, Micro-USB 2.0, MicroSD slot
    • 3.5 mm stereo headphone jack with microphone support
    • MOTION SENSORS: 3-axis gyro, 3-axis accelerometer, 3-axis compass
     
    #4 RadRich, Jul 5, 2016
    Last edited: Jul 5, 2016
  5. jjpetroski

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  6. RadRich

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    Good luck with those. I hated them. They felt very awkward on my face (like you had to look down to see the screen) and had a big module you have to clip to your belt.
    The image quality was very bad (low pixels) and was 4:3 vs 16:9

    If you want, you can read my comments on the Amazon page, link below. My comments are under Bishop.

    https://www.amazon.com/review/R31RD...nce&nodeID=667846011&store=aht#wasThisHelpful

    Here's one my biggest gripes about the MyBuds:
    Maybe a little 4:3 screen is great for FPV racing, but this wasn't working for my usage.
     
    #6 RadRich, Jul 5, 2016
    Last edited: Jul 5, 2016
  7. jjpetroski

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    47% like them (A/B), 39% don't (D/F). Thanks for the concern and I will definitely follow the return policy. So Rad, what did you go with and/or like?
     
  8. RadRich

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    Actually, I have all the material to build my own head mounted display. But I had to deal with personal issues first and now I'm coming back to this hobby as a means to cope.

    I have tested the display and it will work great. I just now need to put forth the effort to craft it all together. I bought everything off Amazon. I plan to put together a tutorial with all the part names, etc. I even bought a Miracast device to have it work wirelessly, but couldn't quite get it to work, so i'll just use the HDMI cable for now.


    This is the screen I bought and tested with the Shield K1:

    [​IMG]
    It's powered by this little device (ignore the iPhone):

    [​IMG]

    The entire head unit itself will be made out of Kaizen foam:

    [​IMG]
    Using this 4.5" x 7" magnifier:

    [​IMG]

    And this for the head gear, which will flip the display portion "up", so you don't have to actually take it off your head.

    [​IMG]
     
  9. jjpetroski

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    Sounds like an interesting project. Confirmed with Seller I've got 14 days on return. I will make it an easy decision. Real P in the A you can't find anywhere to try these out here in Tampa.
     
  10. Vivi_Flysight

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    Visoon HD900 tablet with HDMI input and output and AV input, can work well for DJI Go
     
  11. Roamer105

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    If you plan to use an IOS device (aka iPhone 6 etc.) simply purchase a Lightning Digital AV Adapter (acts as an HDMI - 1080p output AND a lightning connector for the USB cable that connects the DJI remote) for $49 from an apple store and you are ALL SET. Connect the adapter to the iPhone (or iPad) and connect the Phantom RC via Lighting-to-USB to the lightning connector on the adapter. Then use a regular HDMI cable to connect your HDMI headset. Great video quality - no extra power drain from the remote.

    Lightning Digital AV Adapter
     
  12. tml4191

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    Apple device for the win. I bought a "cheap" tablet, and I don't think I'm going to use it unless it's pretty much an emergency. It's usable, don't get me wrong, but it's no where near the performance of an iphone 6. The video feed registers on the iconia a1-840fhd, but it lags a little bit. HDMI has a consistent video feed, and it's even better than an iphone 6 alone. Just to let you know, a cheap alternative is using litchi's new feature called litchi vue. Apparently it works, but when I tested it on an "older" ipad, it was way too choppy for me.
     
  13. tml4191

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    Where were you when I was looking for one of these :) ? Can you please list the msrp of one of your units?
     
  14. alokbhargava

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    Have you tried it ever this concept?

    For your information lightening port on AV- adapter is for charging the device and not an USB port.


    Sent from my iPhone using PhantomPilots