Hi there guys,
I have recently purchased a second-hand transmitter to modify it and use it for my quadcopter.
It uses a LCD screen branded as Baomei BM-8045c. By any chance, is there a way to adapt it and use it with Arduino? I guess the LCD control chip is what I should focus on to do this, but as you can see it is not visible. But the signals should be controllable, right?
I don't know: is the LCD worth the effort to try to use it? Or should I just use any other LCD that I know for sure works with Arduino?
Thanks a lot!
The signals are controllable but without data on the control chip, control is extremely difficult and you have no way to know if damage could occur.
Thanks, that's what I imagined too.
I searched a bit, and it seems that removing the epoxy of the COB part is somewhat difficult and needs special tools/chemicals. So I guess my quest is already over 
I also think that detaching the actual LCD for a later DIY board is kind of a waste of time, right? I mean, I guess in that case I would have to actually build the chip-LCD interface manually, like via assembly or some else low-level programming.. Am I right?
I think that detaching the LCD is a waste of time. C/C++ allows you to do most low level things but if you have to ask then you may not be ready.
I had a friend (now deceased from an unrelated cause) who removed epoxy using fuming nitric acid, a rag, some simple lab equipment, good ventilation, good teachers, experience, and safety gear. It is not a task for an amateur.
Thanks again for taking the time to answer!
To be honest, I always ask because "you never know" 
: maybe there's something I don't know about that makes things easier! But I do know C/C++, even for low-level programming (mixed with Assembly).
The main thing is that the applications maybe is not worth the effort, since nowadays you can easily get another LCD easier to use.. I don't know, I'll think about that.. But if you have any suggestion feel free to express yourself!
Anyway, the process you described is the one I knew about, so as I thought it's not easy to do something like that..
Well, at least I tried! Thanks again!
PS: sorry to hear that...
slim71:
I searched a bit, and it seems that removing the epoxy of the COB part is somewhat difficult and needs special tools/chemicals. So I guess my quest is already over
But why on earth would you ever want to do that? 
If you can't use it, you just want to destroy it? 
Paul__B:
But why on earth would you ever want to do that?
Just because this way I could check the chip behind that, so that I can search its specs and see how to "interacte" with it to use the LCD
Paul__B:
If you can't use it, you just want to destroy it?
Don't think so. I guess I'll just leave it there for now. Maybe, for the current project or another one, I'll get back to it.. Perhaps, I can even think about using all the electronics related (the PCBs inside the transmitter) altogether, without the need of modify anything..
Any other idea?
slim71:
Just because this way I could check the chip behind that, so that I can search its specs and see how to "interact" with it to use the LCD
You are joking!
How could you possibly imagine you could determine anything whatsoever from looking at the chip, even if you had the equipment to do so?
slim71:
Perhaps, I can even think about using all the electronics related (the PCBs inside the transmitter) altogether, without the need of modify anything..
In terms of re-purposing such a device, that is always the most sensible approach. This display has a serial interface and is a separate functional module to the main board indicating that it is "talking" to or at least listening to a microcontroller. The fact that it uses a 2.4 GHz digital communications link - essentially Wi-Fi - also tells you that a microcontroller is involved thous it may well be an ASIC in which case it will be useless to you. If you can first "hack" the microcontroller, you may get somewhere.
That said, if you can find a similar display with a SPI interface as it appears to be, it is likely that it will respond to the same code base. I certainly do not know offhand which one that would be.
Paul__B:
You are joking!How could you possibly imagine you could determine anything whatsoever from looking at the chip, even if you had the equipment to do so?
Meh, just googlin' around I guessed.. But who knows
Paul__B:
This display has a serial interface and is a separate functional module to the main board indicating that it is "talking" to or at least listening to a microcontroller. The fact that it uses a 2.4 GHz digital communications link - essentially Wi-Fi - also tells you that a microcontroller is involved thous it may well be an ASIC in which case it will be useless to you. If you can first "hack" the microcontroller, you may get somewhere.
Already considered all this.. In fact, I even went ahead to check and there seems to be an EEPROM on the main board!
Paul__B:
That said, if you can find a similar display with a SPI interface as it appears to be, it is likely that it will respond to the same code base. I certainly do not know offhand which one that would be.
This is part of the reason I asked, and that I saved all the PCBs and electronic parts. As I said, I've already considered the idea of getting around the problem figuring out the communication "main chip"-LCD board.. But, as you rightly pointed out, the question is: which other display could use a similar interface or similar code base? Since it's a little time-consuming to deepen the context, I'll think about doing it when I can, if I feel like it..
I just figured that maybe someone else could have run into this situation or maybe knew better than me!