Hello,
I've bought about ten 2.8" touchscreen TFTs from the PJRC store. But the five I bought this month are different from the ones I bought in the past. I am feeding the backlight LED pin power through a 200 ohm pot which allows me to hardware dim the screen, or at least it did!
Unfortunately, it doesn't work on the "new" screens.
Has anybody run into this problem and found a fix?
I'm not too great at this stuff, so hopefully it's something simple that I'm just not seeing/getting...
Here is the relevant part of the circuit:
Many thanks for any help!
I've bought about ten 2.8" touchscreen TFTs from the PJRC store. But the five I bought this month are different from the ones I bought in the past. I am feeding the backlight LED pin power through a 200 ohm pot which allows me to hardware dim the screen, or at least it did!
Unfortunately, it doesn't work on the "new" screens.
Has anybody run into this problem and found a fix?
I'm not too great at this stuff, so hopefully it's something simple that I'm just not seeing/getting...
Here is the relevant part of the circuit:
Many thanks for any help!