Hd display Raspberry pi 3, 7,000mah

[jermzz]

1up sent me a prototype today for what I asked for. 6 button and two joysticks. Looks ugly, but I think it will look much better in all black with black buttons. Good for ps1 and n64. Here's the pic. He quotes me 449 which isn't bad considering my GBZ's go for 400 on eBay with zero joysticks, 4 buttons and 240p. All the crap we order from china he probably gets for pennies local.

[Boubobo]

I ordered this screen a while ago, for 22€ on ebay (as 3.5" Raspberry Pi LCD HDMI USB Touch Screen Display Audio for Pi 2 Pi 3 Model B), I was never able to get the touchscreen working, even with the provided os images. The display showed random green vertical lights until I uncommeted

Code: Select all

config_hdmi_boost=4

in config.txt

[jellybelly]

That's the worse looking GBZ I've ever seen

[insomniamonkey]

The 1up guy finally got back to me. Quoted me 350 for one sans the joysticks. Not too bad but it probably could be a lot cheaper. I kinda wish he just sold the board so I can build most of it together. I also found this article from awhile back: http://www.open-consoles-news.fr/2017/0 ... oy-de.html

Shows an older version of the board assembly. Pretty interesting.

[Boubobo]

Just a Hi-res Photo of the screen in action

Full screen

[Boubobo]

And now I know why I wasn't able to get touchscreen to work : if you look closely on the previous photo's top right corner, you can see that my touch screen ribbon came pre-cut for my convenience


Full screen

You can safely cut the left part with the Kedei silkscreen, as there is no electronic on this part. I chose to remove the back-light power switch and solder it always on.
I also removed the screen from the pcb (held in place with two strip of not too strongly adhesive foam :


Full screen

I finally removed the touch screen ribbon as it will never work for me.
I'm not sure if the grounding black wire stuck with some metallic tape is only useful when you use the touch screen. It's soldered to the HDMI plug anchor point.

[Marty33]

hello all.

I received my screen today.

I place on my RB Pi 3, usb cable, blue screen logo with logo, Retropie logo and...................... black screen.

Now, black screen always. No blue screen, nothing.

If you plug the screen into usb (without RB), it turns on ?

Big thanks

[Boubobo]

I place on my RB Pi 3, usb cable, blue screen logo with logo, Retropie logo and...................... black screen.

Did you modify the /boot/config.txt with the apropriate HDMI lines ?

Code: Select all

# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=2
hdmi_mode=87
#hdmi_cvt=<width> <height> <framerate> <aspect> <margins> <interlace> <rb>
#aspect       aspect ratio 1=4:3, 2=14:9, 3=16:9, 4=5:4, 5=16:10, 6=15:9
#margins      0=margins disabled, 1=margins enabled
#interlace    0=progressive, 1=interlaced
#rb           0=normal, 1=reduced blanking
hdmi_cvt 480 320 60 6 0 0 0

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
config_hdmi_boost=4

[Marty33]

Great. You save me.

[Marty33]

I found my problem : No backlight.

I contact the seller and here the response :

hello,
i saw you not ask us to get the driver link.
this is the hdmi driver,
http://en.kedei.net/raspberry/raspberry.html
please have a try, thanks.

My version is 1.1.

And..... drivers for have backlight ?

You have an idea ? Big thanks for help