thanks again .You don't have access to the pins to even try. And if you try to get access, you will almost certainly damage it.
It is most likely a CUSTOM module. Do you understand CUSTOM? Means that it uses whatever protocol the designer chose to use, which may well be one of their own making.
Why do you want to set yourself up for that kind of headache when you can spend $8 and get a standard 5-digit display with a documented interface from Digi-Key or Mouser or one of several other distributors?
I need to use just the LCD of this counter . My problem is " How can I drive it by my own AVR ? " . I don't know its' drive protocol .I also have the similar idea that I want to using the LCD from the calculator, but this kind of the LCD that they always using pin to pin to connected to the chip(we called it black bean in Taiwan).
Do you want to using the LCD or counter?
If you only want to using the LCD, then you have to design the PCB by your own, if you want to using the function of counter, probably it only has two functions, you can control the reset and start/stop when you using the bjts s or mosfets or reed relays to control them.
Not very well. Think of what you have to do to count down from 99999 to 00000. The inputs are probably heavily denounced making iwhich would limit the count rate significantly - perhap to only a few dozen counts per second.With electrical access to the COUNT and RESET inputs you can use the entire counter module as a numerical display.
If you can get your hands on an AVR then you can probably get your hands on an LCD display . The advantage is that you will have the datasheet in front of you and you will know exactly what you are doing .I need to use just the LCD of this counter . My problem is " How can I drive it by my own AVR ? " . I don't know its' drive protocol .
by Jake Hertz
by Aaron Carman
by Jake Hertz
by Aaron Carman