Compatible TFT screens / or replacements

[vakuliniv]

Can I replace the screen from your project by this https://aliexpress.ru/item/4000302982264.htm ? May be you have list of compatible screens?

[zapta]

When I tried to access your aliexpress link got an error page.

The TFT is very speciried 320x480, ILI9488 controller, capacitive touch screen, and 16 bit parallel data pins. I spent a lot of time on aliexpress and didn't find any better than the one from buydisplay.com which is also a stable source.

Recently somebody pointed me to the "3.5 LCD CTP" here and I ordered two for evaluation. If it will work, it will require some changes in the PCB.

https://www.aliexpress.com/item/32862869103.html?spm=a2g0s.9042311.0.0.481c4c4dHx7266

For now, I strongly recommend getting the one from buydisplay.com.

On Sun, May 9, 2021 at 2:23 AM vakuliniv @.***> wrote:

Can I replace the screen from your project by this https://aliexpress.ru/item/4000302982264.htm ? May be you have list of compatible screens?

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[vakuliniv]

Sorry, that is right link https://aliexpress.ru/item/4000302982264.html

as I can understand this screen is maximal close to original screen, perhaps.

I asked, because is some problems with delivery to my country from buydisplay.com

[zapta]

That's an interesting TFT module, thanks.

If you are handy with writing firmware you may make it to work. It seems to have the same TFT controller, 16 bit parallel data lines and same resolution. The main differences are the pins count and order (the buydisplay.com has 40 pins and different order) but you may overcome with this the proper wiring. And more important, its touch uses SPI rather than I2C so you will need to modify the touch driver and again, wire it to the SPI pins of the blackpill though I am not sure if they are currently free.

Hope it helps,

Zapta

On Sun, May 9, 2021 at 11:44 AM vakuliniv @.***> wrote:

Sorry, that is right link https://aliexpress.ru/item/4000302982264.html

as I can understand this screen is maximal close to original screen, perhaps.

I asked, because is some problems with delivery to my country from buydisplay.com

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[vakuliniv]

Thanks. I hope you inclide this display as compatible ( https://www.aliexpress.com/item/32862869103.html ) into the BOM .

[zapta]

That display will require PCB changes and possible a few additional components (e.g. resistor to drive the background LEDs). I have it on order and should arrive in a few weeks. I am also experimenting with replacing the blackpill MCU module with Raspberry Pi Pico. If it will go well, it will provide a more stable source for the MCU module, will see how that will go. In any case, if this will work, it will take months for the new design to be available.

On Mon, May 10, 2021 at 1:54 AM vakuliniv @.***> wrote:

Thanks. I hope you inclide this display as compatible ( https://www.aliexpress.com/item/32862869103.html ) into the BOM .

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[phil-barrett]

For those of us interested in playing along at home, there are 12 options. Which one did you order? I assume it is one of the 3 ILI9488 ones - Capacitive Touch (CTP?) option?

Also, do you have part number and source for the connector? DigiKey or Mouser preferred but LCSC is fine, too.

[zapta]

FYI, I just released a new design which is based on a bare TFT (cheaper) and the Raspberry Pi Pico (more RAM, ROM, speed).

https://github.com/zapta/simple_stepper_motor_analyzer

It also include a general BOM and in the JLCPCB directory bom and pos file for the JLCPCB SMD service for some of the parts.

https://github.com/zapta/simple_stepper_motor_analyzer