Else just run the 12V into the Arduino DC in jack, too.
can i use LM317 for the 4 motors?.. split them 12v = 4 LM317 = 4 Motors.. one Lm317 for one motor?
Here an idea... buy a lead-acid 6 V motocycle battery. And wire the motors direct - with the motors controller.
So you want a supply from the main ( 120 / 220 ) ? right ?
QuoteElse just run the 12V into the Arduino DC in jack, too.Can i also do it at the Vin input pin of arduino?.. and what's the max current and voltage can be supplied in the Vin?