Power an arduino on a 12V circuit I am doing a simple circuit with a 12V power supply to power a 12V LED strip. I'd like to be able to switch ON/OFF the strip with a relay connected to my Arduino. I'd like to know if I can power my Arduino directly from the VIN pin using 12V source. I saw that the Arduino can support up to 12V.

Thank you in advance for the help.
As you have noted, many Arduino (and clones) are rated for supply voltage up to 12V. But note that if you use 12V power, the on-board regulator will get rather hot.  Providing decent ventilation and maybe even extra heat sink would be a good idea.