EngineerJakit
Posts: 3
Joined: Sun Oct 04, 2015 2:16 pm
Contact: Website

Using a 4.3" Display with a RPi 3 or Zero

Fri Sep 06, 2019 6:28 pm

Im currently designing a handheld device that, optimistically, uses an RPi Zero or Zero W as the main component. So far I intend to rig up a mouse controller using an Arduino Pro Micro with tactile buttons and 1 PSP joystick, but then there is the issue of a display. I have this salvaged and operational 4.3" TFT display, which can be purchased off sites like Alibaba or other sellers from China. It took me a while to find out where the schematics or even the pinout list would be, but i found them via this site below. The PDF next to the images has the pinout list

http://www.tekswo-display.com/displays/ ... duino.html

I have been looking around for a method to get this board to work, its mainly the size of it that i want to utilize. There are 40pin board connectors that i imagine would work for this display. (the top of the pinout list recommends a module that isnt manufactured anymore, but i have dug up alternatives.) What im not certain about is what it would take to make a board that could translate the signals from the RPi to the display without everything getting ruined.
Do i try to make some kind of adapter board that could work, and if so, is there any info about that? Is there one already out there that could work? Or should i stick with a different display like a 5" or above?

aBUGSworstnightmare
Posts: 1498
Joined: Tue Jun 30, 2015 1:35 pm

Re: Using a 4.3" Display with a RPi 3 or Zero

Fri Sep 06, 2019 6:50 pm

Your screen has a 24-bit DPI interface, means you can connect it to the Raspberry GPIO directly. Refer to https://www.raspberrypi.org/documentati ... /README.md for more info.
DPI will use nearly all (6-bit color) or all (8-bit color) GPIO, so you need to make sure there are enough left for the rest of your HW.

The picture in this post shows a 24bit DPI 7in display https://www.raspberrypi.org/forums/view ... 25#p931389
A 6in in an uncommen aspect ratio https://www.raspberrypi.org/forums/view ... 0#p1010860
Another one https://www.raspberrypi.org/forums/view ... i#p1072805
And one more https://www.raspberrypi.org/forums/view ... pi#p828968

And ... A 4.3in similar to yours https://www.raspberrypi.org/forums/view ... 5#p1201660

Just a passive adapter (for wiring) is needed and the correct timing.

EngineerJakit
Posts: 3
Joined: Sun Oct 04, 2015 2:16 pm
Contact: Website

Re: Using a 4.3" Display with a RPi 3 or Zero

Fri Sep 06, 2019 8:05 pm

Given that i want to use the GPIO for any additional uses, an adapter would be ideal. Soldering thin wires to the screen's cable is something i doubt i have the patience or skill for.

Since you recommend i use an adapter for this part of the project, ive been window shopping around the internet for any potential candidates. This one im interested in. https://www.adafruit.com/product/2219?g ... Y2EALw_wcB

Do you have any to recommend @aBUGSworstnightmare?

Also since ive never thought to try it, would i be able to make the screen a monochrome color if i used the pins for one of the colors, like Blue for example? I havent explored much with displays so i dont know if that's a thing.

aBUGSworstnightmare
Posts: 1498
Joined: Tue Jun 30, 2015 1:35 pm

Re: Using a 4.3" Display with a RPi 3 or Zero

Sat Sep 07, 2019 6:10 pm

EngineerJakit wrote:
Fri Sep 06, 2019 8:05 pm
Given that i want to use the GPIO for any additional uses, an adapter would be ideal. Soldering thin wires to the screen's cable is something i doubt i have the patience or skill for.

Since you recommend i use an adapter for this part of the project, ive been window shopping around the internet for any potential candidates. This one im interested in. https://www.adafruit.com/product/2219?g ... Y2EALw_wcB

Do you have any to recommend @aBUGSworstnightmare?

Also since ive never thought to try it, would i be able to make the screen a monochrome color if i used the pins for one of the colors, like Blue for example? I havent explored much with displays so i dont know if that's a thing.
pinout of the adafruit board does not match your display --> you will need to build an adapter board

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