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Topic: Is there a max mA for LEDs on the Arduino UNO? (Read 7667 times) previous topic - next topic


Yeah through the Vin pin. The Vin pin should work at 6v becuase I don't think it goes through the polarity protection diode. For flashing LEDs you should be fine if the voltage is a little low anyway.

More than 5v (5.5v max) into any pin except Vin is asking for trouble...  ;)


Coding Badly

I have a minute before we go to agility...

Yikes!  When you said you were connecting 6 V to the board I thought you meant to VIN.  

DO NOT connect 6 V directly to a pin.  [glow]5 V ONLY![/glow]

You CAN connect 6 V to VIN and then use the REGULATED 5 V to drive the LEDs.  There is a maximum amount of current the regulator can provide.  I don't know what that is but do not exceed it.


There is a maximum amount of current the regulator can provide

Well it used to be 400mA but I'm not sure on the Uno.


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