I want to plug the Arduino mini on my LED’S spot where there is 12V VCC (100W).
Is there someone who has a schematic of 9V supply for the Arduino mini?
How many current i need?



You can make a power supply easily with an LM317 adjustable voltage regulator. I use 9.6v battery packs and LM317 voltage regulators to regulate the power down to 9v and below to power my projects. The 12v supply, an LM317 and two resistors is all you need to regulate that 12v down to 9v.

Thanks Horace.
But what is the maximum current?