Pi Zero W GBA [BUILD]

moosepr

@techieandroid at a guess i would say your d/c is the rs on the botton of the connector. There may be some investigation needed on the board to see if the MISO and MOSI pins are there for the touch controller, or for the screen, or both. You may need to lift the screen from the pcb and follow some trances to fully see what is going on

TechieAndroid

@moosepr
Thanksv I'll do that. I saw that the GND and GND pins we're already connected with a trace on the board, same goes for VDD. So I guess I only needed to connect to one point, but it doesn't matter.

TechieAndroid

I ripped the dang ribbon cable connection under the LCD (it was literally impossible to see where it was under there, I had a light and it still didn't help). I admit my strong suit isn't finding out which LCD wires are for what (they aren't marked if you assumed they were, hence why I'm having problems), I have no previous experience in this specific field. I need help. I don't know what I can really do atm. My multimeter bit the dust a while back and I haven't been able to get another. I wish I had an oscilloscope. But I don't. :/ Guess I'll just give up on this screen. Dang it. I hate myself for listening to someone online telling me I could use a ili9341 screen when this screen has no previous history with Pis on the internet.

TechieAndroid

I'm just glad it didn't mess anything up in the process. So my Pi, PowerBoost and battery still work.

AluLagoa

This is the ili9341 me and @moosepr used:
alt text

You used the other version.
The one we used works decently enough for a cheap handheld.

TechieAndroid

That screen is nothing like mine.

moosepr

@techieandroid sorry to hear you ave had problems. It would appear not all ili9341 screens are created equal. Tracing the path from the screen ribbon to the pins is leaning towards the advanced side of things. I have just had a look on aliexpress, and all the 3.5 inch screens that come up when searching for ili9341 are actually 320x480 resolution, and so are probably not really ili9341 screens!!

try and get your hands on a screen that only has a single row of connectors (like on the red boards you will see) and if doubt, send us a link to the screen you are thinking of buying, and we can see if its good to go before you buy

TechieAndroid

@moosepr
Okay. Yeah I'm going to get one of those other screens I guess. Who would have it for the cheapest price and be located in north america?

TechieAndroid

http://www.ebay.com/itm/240x320-SPI-TFT-2-8-LCD-Serial-Port-Module-PCB-Adapter-Micro-SD-ILI9341-5V-3-3-/172822523658?hash=item283d066f0a:g:vLUAAOSwJehZk93F

Is this one good?

AluLagoa

@techieandroid
That one looks good to me.

moosepr

@techieandroid yeah thats the baby!!

TechieAndroid

@alulagoa said in Pi Zero W GBA [BUILD]:

@techieandroid
That one looks good to me.

@moosepr said in Pi Zero W GBA [BUILD]:

@techieandroid yeah thats the baby!!

Okay thanks guys I got it.

Should come soon. Then I can finish building it. :)

I've got my live stream setup so I'll stream it live when I begin building it.
FWIF I think some will watch.

TechieAndroid

@moosepr
Okay so I've got and setup the new screen but I don't like it at all. I don't know if this can be tweaked (probably, I just haven't tried yet) but the screen's dpi is messed up (everything it too small, which is probably just a wrongly set resolution from before when I had a tv connected), and the other major problem is it stutters so bad I can't play any game on it (it stutters, drops frames and tears).

spruce_m00se

@hex I would disagree with this, I have one from Ebay which I converted to 5v and I think its junk, the contrast is poor, and when you have white pixels on a black background you get ghosting across that whole horizintal line of pixels, not the mention that the screen gets incredibly hot.
it is also poor resolution,
yes it works for gaming, just about, but if you are going to invest a good amount of time then I would try to get a better screen.

Hex

@spruce_m00se Can you show a comparison photo/video?

spruce_m00se

@hex I can show a photo at some point, but annoyingly the usb hub i built into the gameboy isnt compatible with keyboards, grrrr, that means that I need to desolder it and conenct a keyboard for some config as I had an urgent money making project (a lotof money ) last month and needed a micro sd urgently, so I robbed the one from the gameboy. now I have to reinstal the gpio pin controller setup before I can play again,

Hex

@spruce_m00se Some point is fine.

spruce_m00se

@hex what would you like to see? the ghosting? or would you like to see the actual screen?

spruce_m00se

alt text
I have a photo of the LCD driver board, the circled white components are Caps that get super hot, I tried to put a ceramic cap alongside them to filter out any high frequency ripple, it didnt really do anything.
the whole thing gets so hot that it softens the hotglue thats holding it in place, and the individual caps get too hot to touch,

Hex

I think you have a short or you have not converted it properly. My LCD board used to do that when I connected to the wrong terminal. Now it runs between room temp and warm. I can keep my finger on the chipset for extended periods.