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Author Topic: What's the difference between "operating voltage" and "input voltage"?  (Read 1795 times)
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Hello.
I've read here (http://arduino.cc/en/Main/ArduinoBoardUno) that UNO's "operating voltage" is 5V but its "(limits) input voltage" is 6-20V. I don't understand this: why operating voltage is BELOW input voltage? I can't make the difference between "operating" and "input", because for me both have the meaning of "necessary to work".

Sorry if my question is too stupid...I am very very rookie on this.

Many thanks in advance!!!

P.D: And sorry for my english, too!!
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The input is the voltage you put in to the jack socket or Vin pin to power the board. This gets regulated down on the board to the working voltage of the chip which is 5V.
You can not put a voltage higher than this 5V into the board as a signal.
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OK! Understood!
THANKS! THANKS! THANKS! THANKS!
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