I finally decided to purchase an LCD screen to mess around with. Once it arrived, I hooked it up the same way it was in the Arduino IDE example files for LiquidCristal. Any time that I hook the LCD up to 5V+ on the VCC pin, and the ground to the VDD pin, the Arduino shuts off until the load is removed, making me think it's drawing too much power. I have tried using resistors on the VCC for the LCD, but either it does nothing, or shuts my Arduino off until I remove the load.
Useful info: -Using an Arduino Duemilanove -Tried powered by USB (5v), tried alternate power supply (12v). Both did not work. -Not using a 10k wiper potentiometer on Pin 3 (Vo), I don't have one. I do have a 50k potentiometer. -Tried using 10k ohm resistor on pin 3. Does not work. -Tried with just power going to the LCD (no data lines), still turns off the Arduino.
The LED on the LCD works, which is a good thing.
My LCD screen: https://www.inventables.com/technologies/lcd-module I couldn't find a datasheet to upload, but I do have the datasheet on paper in front of me.
The datasheet says that the max draw of power is only 4mA when the Arduino puts out 20mA per pin I believe. I have no idea how much the 5V pin can put out.
If you could at least confirm that my LCD is drawing too much power, I would be grateful.