People. This is a new display left over from a Chinese time clock that has no identification. I have an Arduino Uno here and I would like to try to test this display, but it doesn't have any visible components. See the front and back photo. Which library could I try to use? and how to make the connection? If it burns, no problem.
there are some digits and letters on the foilwire
try to google with that.
If it is OK for you to even burn the microcontroller just go ahead
If you want your microcontroller stay health
You would need to insert high-speed-bufferchips inbetween and then start tenthousands of combinations which line might be what
Google says nothing. I'm considering having a little luck with him following some pattern. 18 threads is the same amount of threads as other known models. But which library to use ?
The same library as for the other known models.
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See, it connects directly to the processor on the original board. Can I connect it directly to a 5 volt arduino? I also have a WEMOS D1 here. But I don't have a soldering station. It is difficult for me to solder such thin wires. That's why I ask if it's worth the effort. Will I find a compatible library?
I know it's an unanswerable question, but I'm kind of discouraged.
Only you can decide. If we are voting, I vote No, not worth it.
Time is money. Fun is fun.
If you'd have a great deal of fun trying to get this working, and you can totally accept complete failure along with some damages to the device and/or anything you hook up to it then
go for it.
But LCDs are inexpensive and if you really want to be draining the swamp, not killing alligators, then just buy one of known pedigree, get the library you know will work it, and proceed with the real work or fun.
a7
Here is the datasheet for that processor.
http://www.brmicro.com.cn/uploads/soft/180803/2-1PP3151J9.pdf
You can trace the circuits to the LCD to get an idea of which pins are data and which are power and ground.
Is the original processor running on 5V? If so, the LCD is probably suitable for 5V.
it is 3.3 volts, I measured it with a multimeter from the output of an LM1117 to one of the pins of the LCD connector. Thanks for the datasheet. My question is: Let's say I'm lucky in connecting the wires. Even so, could it be that no known library works on it ?
I will take it very seriously. Thanks.
Is my reasoning correct ?
A factory would not build electronic equipment using common libraries. They would choose to program from scratch, bit by bit, precisely to make what I want to do more difficult. So, it's no use just getting the pinout right, it only takes a few bits to be confused for me to never be able to use this LCD 100% using common arduino libraries.
Take photos against a white background. Use google lens to try to identify the manufacturer. Search using Baidu and Alibaba search engine. Keep searching ID numbers until you come across someone else's work. Ideally you'd find the datasheet for the screen too.
Why would they do that? They would probably start with whatever driver code the maker of the display provides so they don't waste money paying developers to write everything from scratch. The maker of the display has the incentive to make it EASIER, not harder, to use their hardware.
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