Control 64 rgb leds for a pov display

[exapod]

Hi,
i have to build a pov display with two blades with 64 rgb leds on each of them (128 leds total).
I was thinking of using the TLC5947 to control the leds, but it is a little expensive, can someone reccomend a cheap alternative?I need at least 8 bit pwm and current control.
Thanks for the help.

[timbos]

You can get addressable RGB strips with 60led/m which are controllable with a micro. They use a chip that I think is a WS2801, which talks using a 1-wire serial protocol, although there's also an I2C version IIRC.
Don't know what your pov application is, but I've used one of these strips for a simple pov and light painting rig.

[David_AVD]

The 2801 chip is data+clock and very easy to drive.  The 2811 chip is Manchester and very fussy timing wise.  You can get 5050 RGB LEDs with inbuilt 2811 chip now too.

[mikeselectricstuff]

Hi,
i have to build a pov display with two blades with 64 rgb leds on each of them (128 leds total).
I was thinking of using the TLC5947 to control the leds, but it is a little expensive, can someone reccomend a cheap alternative?I need at least 8 bit pwm and current control.
Thanks for the help.

Think about what PWM frequency you might need for POV.....