big lcd display arduino made in china

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Well, so far at least, 40x04 is the largest LCD character display that I"ve seen available to the consumer/hobbyist market. If somebody out there is selling something larger, I"d be interested in seeing tech specs on the hardware.

I presume that, because of economic forces, and the limitations of 4-bit / 8-bit address lines, the next logical step up would actually be an LCD or OLED graphics display panel; which would, of course require more resources from the host micro-controller board.

Oh....I almost forgot to mention that, as with the 40x02 displays, you WILL NOT be able to use the run-of-the-mill i2c / SPI character LCD backpack boards to simplify the addressing scheme from the controller board to the display itself. Most of those top-out at 20x04.

I don"t know where the term "PLJ-6LED 2004A" came from since the first half (PLJ-6LED) seems to refer to a 6-digit, 7-segment display that does not show up on the Sainsmart website. The second half (2004A) comes up often since it refers to the 20x4 display size. It doesn"t much matter which one you are using since they are all more or less the same as long as the row of pins is at the upper left (and not the lower left) corner of the pc board.

I assume you mean the "New Liquidcrystal library" which is a replacement for, not an accessory to, the library that comes with the Arduino IDE. You must follow the installation instructions for this library which you can get here. I believe they also come packaged with the library. Basically you have to remove all traces of any other LiquidCrystal libraries for this one to compile.

I assume that you are referring to this ArduinoInfo page, and to the device he calls "I2C LCD DISPLAY VERSION 1:" That tutorial is actually the one I used when I was tinkering with my adapter which looks like that one and also came on a slow boat from the far east, Banggood in my case.

You also have to deal with the connections between the chip on the IC and the pins that go to the LCD module. These are specific to each pc board and the tutorial gives you the constructor that goes with each of the boards pictured. There is a "guesser" sketch available here if you want to go that route.

Both those displays say they have an SPI interface, so that is how you connect them to the Arduino. But that is only the start, you then need to drive them with software. The thing to look at here is the IC that they mention. In the case of the 240 by 160 this is the ST7586. If you are lucky then someone might have written a libiary to drive them. Otherwise you will have to go through the data sheet and see if you can figure out how to do it.

Note that the way this is normally done is to write routines that modify a block of memory in the Arduino and then dump that block of memory to the display. In the case of 240 by 160 this will require at least 4800 bytes:- ( 240 * 160 ) / 8, for one bit per pixel, which is more than the 2K of a Uno and half of the available memory in a Mega.

If you get a display from an Arduino savvy vendor, there is likely to be a libiary to drive it because it is in their interest to supply one. Of course you pay for this in a higher price for the display but it will work. However these libraries will still be heavy on the memory, as yours will have to be if you write your own.

I"m looking for a transflective B&W dot matrix LCD screen with a high resolution (~480x320 pixels, ~7x12cm). I"m trying to recreate a device I purchased ~10 years ago, and the screen is a key component. I"ve looked around for a screen that would fit my requirements, but all I can find are backlit color screens, which take way too much power, or e-reader screens, where the refresh rate is far too slow. I"ve also found much smaller transflective LCD screens, but I want a big one!

I would like to recreate my favorite electronic device ever: a Casio Ex-word electronic dictionary from ~10 years ago (the dictionaries were much snappier before they switched to full-color screen models). You can see what this device looks like here: Casio XD-GW9600 Setup Video - YouTube. It"s basically a small computer; it has a keyboard, a small touch LCD for writing in Chinese characters, and a 480x320 dot matrix transflective LCD for browsing dictionaries. Even with constant steady use, it lasts many months with just 2 AAA batteries. The size is perfect, and although it"s wider than a smartphone these days, it fits comfortably in the hands and the text is really clear (extra important for viewing Chinese characters!).

The Arduino board has a wide variety of compatible displays that you can use in your electronic projects. In most projects, it’s very useful to give the user some sort of feedback from the Arduino.

With the TFT display you can display colorful images or graphics. This module has a resolution of 480 x 320. This module includes the SD card socket and SPI FLASH circuit.

This is a tiny display with just 1 x 0.96 Inch. This display has a black background, and displays characters in white. There are other similar displays that can show the characters in other colors.

None of these instructions will produce a change on the screen without a display.display(); method. If your script does not appear to be working check you have included this line at the bottom of your screen changing code.

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A few weeks ago, I wrote this article about using a text variable as an array, either an array of strings or an array of numbers, using the covx conversion function in addition for the latter, to extract single elements with the help of the spstr function. It"s a convenient and almost a "one fits all" solution for most use cases and many of the demo projects or the sample code attached to the Nextion Sunday Blog articles made use of it, sometimes even without mentioning it explicitly since it"s almost self-explaining. Then, I got a message from a reader, writing: "... Why then didn"t you use it for the combined sine / cosine lookup table in the flicker free turbo gauge project?"105 editions of the Nextion Sunday blog in a little over two years - time to look back and forth at the same time. Was all the stuff I wrote about interesting for my readers? Is it possible at all to satisfy everybody - hobbyists, makers, and professionals - at the same time? Are people (re-)using the many many HMI demo projects and code snippets? Is anybody interested in the explanation of all the underlying basics like the algorithms for calculating square roots and trigonometric functions with Nextion"s purely integer based language? Are optimized code snippets which allow to save a few milliseconds here and there helpful to other developers?Looking through the different Nextion user groups on social networks, the Nextion user forum and a few not so official but Nextion related forums can be surprising. Sometimes, Nextion newbies ask questions or have issues although the required function is well (in a condensed manner for the experienced developer, I admit) documented on the Nextion Instruction Set page, accessible through the menu of this website. On top of that, there is for sure one of my more than 100 Sunday blog articles which deals not only with that function, but goes often even beyond the usual usage of it. Apparently, I should sometimes move away from always trying to push the limits and listen to the "back to the roots!" calls by my potential readers...Do you remember the (almost) full screen sized flicker free and ultra rapid gauge we designed in June? And this without using the built-in Gauge component? If not, it"s time to read this article first, to understand today"s improvements. The June 2022 version does its job perfectly, the needle movement is quick and smooth, and other components can be added close to the outer circle without flickering since there is no background which needs constantly to be redrawn. But there was a minor and only esthetic weak point: The needle was a 1px thin line, sometimes difficult to see. Thus, already a short time after publishing, some readers contacted me and asked if there were a way to make the needle thicker, at least 2 pixels.Recently, when playing with a ESP32 based NodeMCU 32S and especially with its WiFi configuration, I did as (I guess) everybody does: I loaded an example sketch to learn more about the Wifi library. When you set up the ESP32 as an access point, creating its own wireless network, everything is pretty straightforward. You can easily hard code the Wifi name (SSID) and the password. But what about the client mode ? Perhaps one needs to use it in different environments. And then, a hard coded network name and password are definitively not the best solution. Thus, I thought, why not use a Nextion HMI for a dynamic WiFi setup functionality?Although the Nextion MIDI I/O interface  has been primarily designed as an add-on for Nextion HMI screens to transform these in fully autonomous MIDI devices as shown in previous blog posts here, it is also of great use for any Arduino based electronic music project! Many MIDI projects for Arduino suffer from a lack good hardware support. There are sophisticated code, excellent libraries and an infinity of use cases, but afterwards, things tend not to work in a rather rough environment in the studio or on stage. That"s because two resistors and a few Dupont wires on a breadboard besides the Arduino are not really an interface which could drive your Synth, Sequencer, or Drum machine over a 5m long MIDI cable.