I bought a cheap 3.2 inch lcd tft online. I connected it to a raspberry pi zero w and it works great!
One small problem though.
It does not support software backlight led brightness control. Apparently the LEDs are wired directly to 3.3V. I have seen some posts where people are hacking some 3.5 inch lcds to achieve software brightness support by adding a wire to a gpio pin.
I have attached the back of the lcd to this thread.
Do anyone know which resistor or chip pin I'm supposed to short or connect to a gpio?
I'm only interested in switching off the backlight. It does not need to have a gradual decrease in brightness.
Thanks everyone. I've been scanning the web for days trying to find an answer.
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