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LCD

Workshopshed
Workshopshed over 9 years ago

I got myself a 7inch LCD cheap on Ebay thinking that it had a HDMI connector on it but it actually only has a ribbon connector which is described as a "LCD Interface 24-bit parallel".

 

7" Capacitive Touch 800*480 TFT TTL LCD Screen Display Module For HDMI | eBay

 

LCD Interface Definition

 

PIN NO. SYMBOL DESCRIPTION Type FUNCTION

 

1 VLED- Backlight negative input Backlight negative, connects to GND or PWM control

2 VLED+ Backlight Positive input Backlight Positive, 5V typical

3 GND Ground input Ground

4 VCC Power supply input Power supply, 3.3V

5 R0 Data lines input Red layer data lines

6 R1

7 R2

8 R3

9 R4

10 R5

11 R6

 

I was wondering if there was some kind of module I could get that would convert the HDMI signal back to the LCD signal. Any suggestions what to search for?

image

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  • Workshopshed
    Workshopshed over 9 years ago

    Ok, all of those who said "get your self a ready made board" can now say "I told you so"....

     

    The board came with no instructions and a "bodge" connector (now held together with tape, so I don't loose the bits) that allowed you to connect the ribbon connector to the sockets on the board. It all fitted together ok so I powered it up.

     

    The connector did not clamp the ribbon very well at all and although it did managed to get a white image on the screen a couple of times, it eventually slipped and shorted the pins on the ribbon cable, frying the end of the cable.

    image

    So conclusion is.... it might work but I'd need a better way of connecting up the cables.

     

    Plan is to put these into the "round tuit" box and buy a ready made board with all the correct connectors, USB and HDMI.

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  • Workshopshed
    Workshopshed over 9 years ago

    Ok, all of those who said "get your self a ready made board" can now say "I told you so"....

     

    The board came with no instructions and a "bodge" connector (now held together with tape, so I don't loose the bits) that allowed you to connect the ribbon connector to the sockets on the board. It all fitted together ok so I powered it up.

     

    The connector did not clamp the ribbon very well at all and although it did managed to get a white image on the screen a couple of times, it eventually slipped and shorted the pins on the ribbon cable, frying the end of the cable.

    image

    So conclusion is.... it might work but I'd need a better way of connecting up the cables.

     

    Plan is to put these into the "round tuit" box and buy a ready made board with all the correct connectors, USB and HDMI.

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  • clem57
    clem57 over 9 years ago in reply to Workshopshed

    Thanks Workshopshed for showing "The proof is in the pudding".

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  • uscdadnyc
    uscdadnyc over 9 years ago in reply to clem57

    AED wrote>>...For what it's worth (probably nothing)...

    USCDADNYC Reply>> Actually I got a bit of info from your Data Dump. That being (Forgive my Probability & Statistics ineptitude)

    w/ 8 R-bits, 8 G-bits, 8 B-bits (Red Green Blue), NO Wonder Manufacturers "tout" over 16 million Colors. Isn't it something like 3 Colors (R,G,B) each having 8bits. Some formula involving 8! (factorial) OR/AND 8**2 maybe involved? AAR a pretty Big #. Thx for the info.

    BTW what country are you guys/gals resident in?

    NOTE: This reply to AED was LOST in element14 (i wrote it maybe two weeks? ago) AAR I present it now. That element14 recovered it for me.

    USCDADNYC (NY NY USA)

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  • uscdadnyc
    uscdadnyc over 9 years ago in reply to uscdadnyc

    TO AC who wrote>>...Ok, all of those who said "get your self a ready made board" can now say "I told you so"....

    USCDADNYC reply>> If the ready made board was the RaspPi Official 7" Touch LCD, then I beg to differ. But by the pic posted by AC, it does not look like what I got. AAR the official TFT LCD was a dream to installed. I believe maybe Peter Oakes (sp?) made a great youtube video on the installation. BTW there is a mistake in the video, that they have posted a CORRECTION for. I could take apart my RaspPi 3B-SmartiPi-Case-TFT-7" LCD, and post pics of my solder-job within, if that will help?

    USCDADNYC (NY NY USA)

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  • Robert Peter Oakes
    Robert Peter Oakes over 9 years ago in reply to uscdadnyc

    I did, right here, and yes there was one correction on pin connections

    You don't have permission to edit metadata of this video.
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    ***********************************************************************************************************************

    I accidently had the ground cable from the LCD on pin 8 and not 6 on the PI Header. Please make sure you use PIN 6 for the ground.

    ***********************************************************************************************************************

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  • the-dubster
    the-dubster over 9 years ago in reply to uscdadnyc

    UK for me.

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