Is a quartz crystal required for the Atmel Atmega328 for it to work when its not in the arduino?
Do i still need all the component's you listed for it to work or just the crystal?
just a blank LCD.
While it is true that a crystal is not required, the '328p must be correctly configured using what is known as the 'fuse bits' to operate without a crystal. When you do that, there are several choices for which internal oscillator speed to use. All of this has to line up with the build settings or you get clocks running at the wrong rate, if they run at all. None of it is setup for what you want to do "out of the box" on a raw '328p, sorry to say.If you put a '328p that is fuse-configured to expect a crystal oscillator into a breadboard that doesn't have one, it won't work because it isn't getting the clock it expects. This is one possible explanation for your system appearing dead.It would be helpful to know where you got the '328, whether it has a bootloader on it and what the fuse settings are. Do you have an Arduino board or an AVR programmer to set fuses with?Also, have you checked the voltages at the +VCC and GND pins on the '328p with a voltmeter (or even an LED) to make sure they're about right?Finally, it makes sense to put at least a 10uF electrolytic decoupling capacitor on the power input to the arduino. It may run without it, but will die at the first glitch, leaving you wondering what happened. Bad practice.-br
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