Calculator´s LCD

[mister_e]

do you have any part# for your LCD or datasheet. That will be helpful in case you really need help by someone here

[srspinho]

Hi Steve,

you´re right about the Part#

The problem is : I have a big box full of those 8 digits calculator´s LCD (aprox 2000 units) with no Id´s, but I know they were origanlly designed for calculators.

I did some comparisons with some other chinese calculators and the display pinout are practically the same, with some no relevant changes (pin spacing etc)

What I would like to know is the main idea on how to drive a regular LCD with no embeded controller and if it is possible to be done with PicBasic.

Thanks

Sérgio

[mister_e]

Regular LCD must have a regular frequency running on the backplane pin. HPWM can be used for that. Once you have a frequency on this pin, just try to find the according pinout.

Basically it's not really different than to drive regular multiplexed 7 segment display

and yes you can handle it under PBP, but it's maybe easier to use LCD driver IC for that depending on your programming skills.