Problem connecting 10W led + Led driver Directly Arduino Uno can anyone give me an advice on connecting an 10W led + 12 volt drive to an Arduino Uno? it works without the board but when i tried to connect to Uno it doesn't work anymore. Thankyou
To operate LED using Arduino you will need a switch that can be operated using electronic switch like transistor, Mosfet or Relay board.
More easy and reliable option would be using Relay Board.

You can visit this link and can get more idea....

http://www.electroschematics.com/8975/arduino-control-relay/