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Yes, without care, don't.
How did you wire it all up ? Can you post a diagram ?
NO pin on an Arduino output will accept 12V.
Does the LED work if you connect it, on its OWN to a 12V supply ?
If it does, you need to make a circuit, like Rick says, which will drive it with a 12V supply AND a pin on your Uno.
your uno will only supply 20mA current. Not enough to drive the 10 watt led. You need to control a relay or power FET to act as a switch for a separate power supply for the LED friverrt. Look up uno interface ccts.
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Posted:Mar 19, 2017
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