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Topic: Arduino 5v Pin (Read 749 times) previous topic - next topic

laxplayer1199

Hey everyone! I'm new to Arduino, so this might be a "dumb" question: is it possible to use the 5v pin on the Arduino to supply power to the Arduino? I know it is usually used for power output, but I was was wondering if it works as a power input. Thanks in advance!

- Charles Fries

CrossRoads

Yes, you can supply 5V to the Arduino via the 5V pin, bypasses the voltage regulator.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


thebfs

but their is just a vin pin.
why not use it?

CrossRoads

You can't put 5V in the Vin pin and get 5V at the chip. You lose voltage across the reverse protection diode and thru the regulator.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

thebfs

oh good to know.
But would it work with higher voltage? 7-12v

CrossRoads

Yes, 7-12V at the Vin pin will let the regulator create 5V.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Texy


oh good to know.
But would it work with higher voltage? 7-12v


....that's the whole point of it ;-)


Texy

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