New member
I have acfah4002ayybjp 40x2 display and I was wondering if anyone could tell me how to set up the backlight so I can turn it on and off with the software? I have found some schmatics that look like they might work but there is a disclamer of the bottom stating that they do not know it they work. Anyone have any experience with this?
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CF Mark

You could build it, but youll have to then write your own software to control the whole LCD (not just the backlight), because there isnt any software i know of that will let you do it.