RGB led driver ic lpd6803

[dominoc]

The WS2801 strip uses PWM to control the LEDs.There is a schematic and description of this on page 10 of the datasheet here http://www.adafruit.com/datasheets/WS2801.pdf but I'm not sure how to calculate the value of the two resistors.

[Tina10]

I have never done an LED dimming based project so was just wondering on which ICs can be used if 6 to 7 channels need to be controlled with around 1 to 2 Amp current for each channel?
Also is the use of such ICs including the one you mentioned above in this post required if you have PICs and IRF N or P type Mosfets?

[jimseng]

Hi.
I'm no expert but I am doing exactly this at the moment. I have done it with an Android ioio board and mosfets and now I am doing it with a PIC18F14k22. It has 5 hardware pwm outputs. I used ttl level mosfets driven directly and they can carry a couple of amps. The resistors need heat sinking though but it was easy. I also purchased a 5m RGB LED strip off ebay. It comes with a controller. I piggy backed onto that and that is capable of driving about an amp per channel. Right now I am getting my Raspberry Pi to act as a web server to control the RGB strip for no other reason than because I can. I reckon you should look into the many pics with hardware pwm and build your own drivers.