[calculate] rgb leds + sparkfun spi PCB + Arduino

Forum 2005-2010 (read only) General Frequently-Asked Questions
16

seeedstudio,
your leds are like mine ?
how could you use only 5V ?

I really have lacks/problmes with electricity ... (I studied that, 10 years ago, but..)
the USB cannot drive more than 500mA...
all your leds require less than 500mA?