I’m currently prototyping using a MCUfriend 3.5” LCD on a Mega2560 with a large 7 segment style numeric font - running a counter going from 00 to 63 and displaying the digits is taking 15 seconds. I appreciate that using an Uno LCD on a Mega is far from optimal. I’m looking to improve performance by switching to a Due with a different LCD. I need all the IO pins on the 36 way connector so maybe I’m forced into using SPI? I’d be happy to go a bit bigger and the Coldtears CTE50 looks nice but I can’t find where to buy one (I’m in UK) and I understand that there are many cheap clones that don’t work well so I’m at a loss as to quite where to go from here.
Can anyone recommend a quality, fast LCD 3.5” to 5” ideally with the option to switch off the backlight.
They are not cheap, but they have a built-in microcontroller and are controlled via a serial connection. Even with an Arduino Nano it seems to me that a pretty good effect could be achieved.
Thanks for your reply - I’m not sure how you connect these displays to an Arduino or what driver you would use (and both of those factors are going to have an effect on performance).
Which library did you use for your test? Do you have MEGA kind of MCUfriend display?
Maybe take a look at Arduino_GFX, it has a databus class for DUE, Arduino_DUEPAR16.h
Sorry, yes, I should have said. It is an Uno style display using the mcufriend drivers. I’m going to try plugging it into the Due and see if that makes enough of a difference to get me by but I would still prefer something slightly bigger and with backlight control.
I had some experience with big TFT displays, but mostly with parallel interface for matching STM32 boards. I recently bought some 5" displays with on-board ESP32 processor. But these have limited connections for external IO.
Maybe you could take a look at Waveshare 7inch Capacitive Touch LCD (C) 800x480, it has selectable SPI or parallel 16bit interface.
Or search for SSD1963 in the forum. There should be some posts, some from me.
-jz-
I looked at the 4” display for Arduino and that looks really nice. None of the official UK distributors offer it for sale but I have asked if it is available to special order. Thank you.