pov poi

hello.  designing pov  poi swing around , make patterns.
easy huh.

my plan use array of 50 rgb common anode led on each side of pcb.

to drive led i'm using tlc5940 in series. (10 of) i'll use 0.1uf capacitor across 5v gnd decoupling @ each chip.

the processor ive choose  use atmega256. memory storing images.

the images stored on ram long array.

 i have embedded isp headers programing.

 i program through ftdi breakout board.

i communicate tlc chip  through arduino library , send first 150 bytes. first 50 led. ( have multiply rgb code 4 12 bit pwm slow down not believe. )
then tlcupdate() send data chips.
i delay x repeat next 150 bytes.

how long  take , fast enough pov picture? speed main concern.
i've noticed uses teensy has more ram , faster spi.
will atmega256 spi fast enough reliable picture? or should bite bullet , teensy? i'd prefer embedded system. nice , tidy .

my other option apa102 i'd again prefer fabricate whole thing.

my other concern power usage.

if have 100 rgb led @ .6ma 60a, @ 50% brightness it's 30a if lights on third of time it's still 10a

i going use ubec powering led might have shrink array.

any comments suggestions or warnings?

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