Powering LEDs from VCC pin with 240mA

Other Hardware Motors, Mechanics, Power and CNC
1

Hi

For a decoration I plan to power LEDs which already contain a controller using an Arduino Uno (Rev 3). I am using a AC/DC adapter which provides enough current.

My question is: Can I plug-in the AC/DC adapter using the 2.1mm plug into the Arduino Board and connect the power source of the LEDs to the VCC pin? Or is this too much current for the Arduino board?

I assume there is a direct connection between the power plug and the VCC pin.

Best

2

VCC pin

??

Do you mean the 5 volt pin?
or
Do you mean the Vin pin?

Always start with a schematic/wiring diagram.

3

Do you mean the 5 volt pin?
or
Do you mean the Vin pin?

I mean the VCC pin, not the 5 volt pin.

4

using an Arduino Uno (Rev 3)

I don't see a Vcc pin. labled on the Rev. 3 board.

Vcc in the Rev 3 schematic is +5volts.

You must be confused with the Vin pin.
If you use the Vin pin for the LEDs you will have to control them with drivers as the digital pins on the Arduino will not work with the voltages found on the Vin pin.

5

I assume there is a direct connection between the power plug and the VCC Vin pin.

No there is not. It goes through a diode so you are limited by the current / power rating of this diode, to about just under an amp.

6

Yes, my fault, I mean the Vin and not a VCC pin. Thank you for the answer.

In this case I better use the input from the power source directly and pass it to the Arduino via Vin pin.

7

ZVe69:
In this case I better use the input from the power source directly and pass it to the Arduino via Vin pin.

You sure you mean that?