BUT there is a 100 ohm smd resistor in series with anode of the backlight LED, i want to remove the resistor and use Arduino PWM to control the backlight or i can just replace that resistor with a 330 ohm or a 1K resistor.
Red box showing the resistor and blue box showing the Jumper.
Also I2C module itself have a jumper for LED backlight which also goes to that resistor...
Just wanted to ask here and make sure it is going to work before doing any modification to the LCD.
which way is better? is it going to work?
UPDATE: i used Arduino PWM and a 2n2222 transistor and was able to successfully control the backlight brightness via jumper pins of I2C module.