CrossRoads:
The question is: Do you need 4A of 5V current? Or do you need less, even tho your 9V source is capable of supply much more (4A)?
yes, I need 5v 4A.
my battery is are 2: http://www.ebay.com/itm/BRC-18650-3-7V-4500mAh-Li-ion-Rechargeable-Cell-Battery-UltraFire-Red-New-2pcs-/171095669544?pt=US_Rechargeable_Batteries&hash=item27d618bb28
my leds are these: http://www.mikrocontroller.net/attachment/180459/WS2812B_preliminary.pdf
Quantity: 64 leds rgb
power leds(64 leds ): 5V 4A
this problem, I can not fix it. and I take a long time in this.
someone help me plz