Hello everyone, I'm new in arduino, and i have a project by using nokia lcd 5110 and i bought it yesterday. But when i connect it with my arduino like in this tutorial https://learn.sparkfun.com/tutorials/graphic-lcd-hookup-guide/hardware-assembly--hookup , the backlight is on but the screen is blank(nothing show up in there just a blue color from backlight). So can you please help me to solve this problem?
I to am having this problem using the same LCD Module that you had pictured
After reading this link: How to use a Nokia 5110 84X48 LCD display with your Arduino (It's easy and cheap!) (in the comments section) someone mentioned this displays might be rather picky with their VCC voltage so i tried limiting it with a voltage divider but that didn't work and then i tried limiting the voltage down from the 5v supply but all that did was fry the trim pot i was using.
The only other thing i could think of was that it was a problem with the code which i used from this link https://learn.sparkfun.com/tutorials/graphic-lcd-hookup-guide and i have also tried the Adafruit code using the supplied libraries which still didn't work, finally i tried adjusting the contrast PWM setting and still nothing.
Is it a faulty display ? I brought 3 from ebay and they all have this problem.
I see from the attached image you are using the 3v3 regulator on the Arduino UNO board.
The 3v3 regulator is capable of 50mA only, but with the backlight on there was this comment from SparkFun.
You might need to do some limiting of the backlight supply ...
Mark
I see from the attached image you are using the 3v3 regulator on the Arduino UNO board.
The 3v3 regulator is capable of 50mA only, but with the backlight on there was this comment from SparkFun.
You might need to do some limiting of the backlight supply ...
Mark
Thanks for the tip!
there is now a 330 ohm resistor in series with the BL(led) pin.
I got this to work in the end by tweaking the bias and contrast settings on the lcd
this tutorial: https://www.youtube.com/playlist?list=PLjzGSu1yGFjXWp5F4BPJg4ZJFbJcWeRzk
and this data sheet: https://www.sparkfun.com/datasheets/LCD/Monochrome/Nokia5110.pdf
helped a lot.
however i think this model of LCD differs slightly from the one shown because the backlight doesn't turn on when pulled low, it probably needs to be controlled via PWM.
