LED array with Lilypad Arduino? (noob)

Hey all,

I’m jumping into electronics and Arduino at the same time, so please forgive my naivete. I want to use a Lilypad (Duemilanove ATmega328) to control an array of regular two-pin LEDs. There are 14 output pins on the Lilypad, so I reckon I can turn one LED on at a time over a 6x8 array and use POV by turning each on in sequence.

My main concern at the moment is with power draw. The output pins are rated for 50mA output at 5V, similar to the 20mA for the LEDs. But does the board limit the current, i.e., will I burn out the board of i connect the LEDs w/o other resistance in series? If so, is it really just a matter of providing each of my rows (or columns) with a series resistor on the pin?

Thanks for help with an embarrassingly simple question. :-/

does the board limit the current

It does but it will not limit it to a safe value either for the board or the LED.

s it really just a matter of providing each of my rows (or columns) with a series resistor on the pin?

No each LED requires it’s own resistor, and the row needs a driver.
See:- Econo Monome