retrolefty:
twirap:
I am a little confused...Nokia 3310/5110 LCD tutorial (PCD8544)
says you need a level shifter for a 5v microcontroller...Although arduino has a 5 V output pin there is also a 3V output pin...cant I just use that? I dont care about the backlight for now.
Are you not confusing I/O pins with power pins?
i am not sure what i am confusing with what but i got it working!!! I didnt use a level shifter just plugged it in..
Dont know still why level shifter was needed since arduino has 3 v output power pin...Dont know what a 5v or 3v micro controller really means..
if I wanted to use the backlight it says to use a current limiting resistor. I am also told backlight operates on 5v so cant I just use 5v power pin from arduino for backlight and continue using the 3v power pin from arduino for the LCD text display?
I am not sure why I need a current limiting resistor unless my power supply voltage is exceeding the device's voltage requirement since I was told that "your device will only use as much current as it needs"