[Guide] ili9341 SPI TFT Screen on Retropie

[gamedude13]

I'm glad you had success! The viewing angles are not the best, they are actually designed to be used in portrait mode with the chip section at the bottom. But that is kinda the wrong way for gaming! There is a less common ili9342 that is apparently the same screen in landscape, but I have not had chance to test mine yet

Ok, thanks for the reply... Anybody got experience with the TFT that is used in /u/Ryzee's mod?
https://nl.aliexpress.com/item/3-2-inch ... 79195.html

[moosepr]

That screen looks to be just a larger ili9341. With a bit of careful soldering you could transplant the larger screen into to board of a smaller screen

Or you can get a custom board made up to let you use the screen like the one I designed a while back

https://oshpark.com/projects/BP9tGKag

This is designed for a 2.2 inch screen which only has 14 pins, but the last 4 pins on larger screens are only for touch, so you can overhang them

IMG_20161229_213514.jpg (791.93 KiB) Viewed 6827 times

[gamedude13]

That screen looks to be just a larger ili9341. With a bit of careful soldering you could transplant the larger screen into to board of a smaller screen

Or you can get a custom board made up to let you use the screen like the one I designed a while back

https://oshpark.com/projects/BP9tGKag

This is designed for a 2.2 inch screen which only has 14 pins, but the last 4 pins on larger screens are only for touch, so you can overhang them

IMG_20161229_213514.jpg

I saw the "pitch-conversion" pcb's at OSHPark... What do you mean... could I transplant the 3.2 inch from aliexpress to the 2.2 inch PCB (which has nice solderable connections)?

[moosepr]

You sure could! Just make sure you get pin 1 in the right place and your golden

Would be the same as doing this

http://www.sudomod.com/forum/viewtopic.php?f=33&t=3675

[gamedude13]

I reread this thread and it is clear now... I will buy the "ili9341 minimal copy" board you designed and hook it up. Which resistor did you use for the backlight? Thanks!

[gamedude13]

all parts ordered (except het SMD resistor). Let the wait begin...

[moosepr]

You need a 10 ohm 0805 resistor. Little bit tricky to solder but they are cheap! Can probably get 100 for a dollar

[abrugsch]

10 ohm for the backlight resistor?

[moosepr]

Yeah it's tied to 3.3v so it only needs a little drop. You could even bridge it if you were really struggling to get a resistor

But I'm not sure on the long term impact that would have

[abrugsch]

I'll see what's in the massive box'o SMD resistor reels at the 'space. There's a nice full reel of 330R 0805's which I've been plundering for GBCartSlurp since my 150R's have been a bit bright for my LED's (despite having calculated the value from the datasheet)