I dont know whatever the form is suitable for this kind of post or not, but wanna share a post for newbies and hobbyists that is interested in Aurduino programing. i hopy they will learn some thing new from the below article..
In this diagram it is interesting that the 16 MHz crystal gets a prominent mention, however the fact that it does not power the main processor does not (the Atmega328P).
The clock for that is the unlabelled resonator to the right of the crystal (just above the clock pins, pins 9 and 10 on the chip).
The crystal is for the Atmega16U2 USB interface chip.
It's unfortunate that newcomers stumble upon websites like this and pick up misinterpretations of the datasheet such as:
"DC Current (Max) ... 40 mA (per I/O Pin)".
floresta:
It's unfortunate that newcomers stumble upon websites like this and pick up misinterpretations of the datasheet such as:
"DC Current (Max) ... 40 mA (per I/O Pin)".
Don
Can't trust one post, but trust the whole internet