Pages: 1 [2]   Go Down
Author Topic: Is there a max mA for LEDs on the Arduino UNO?  (Read 3084 times)
0 Members and 1 Guest are viewing this topic.
North Yorkshire, UK
Offline Offline
Faraday Member
**
Karma: 104
Posts: 5531
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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...  smiley-wink

Mowcius

Logged

Global Moderator
Dallas
Offline Offline
Shannon Member
*****
Karma: 178
Posts: 12288
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset


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.
Logged

North Yorkshire, UK
Offline Offline
Faraday Member
**
Karma: 104
Posts: 5531
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
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.

Mowcius
Logged

Pages: 1 [2]   Go Up
Jump to: