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Electronics => Projects, Designs, and Technical Stuff => Topic started by: exapod on August 22, 2013, 01:02:04 pm

Title: Control 64 rgb leds for a pov display
Post by: exapod on August 22, 2013, 01:02:04 pm

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.

Title: Re: Control 64 rgb leds for a pov display
Post by: timbos on August 23, 2013, 07:08:45 am

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.

Title: Re: Control 64 rgb leds for a pov display
Post by: David_AVD on August 23, 2013, 07:34:06 am

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.

Title: Re: Control 64 rgb leds for a pov display
Post by: mikeselectricstuff on August 23, 2013, 09:21:02 am

Quote from: exapod on August 22, 2013, 01:02:04 pm

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.....