Originally Posted By: LittleBlueThing
Originally Posted By: sn00p
That's the wrong part, why don't you pick an IO expander than natively supports PWM?


Because I'm clueless - this is the first time I've even glanced at i2c or anything like it smile

The basic schematic is

RPI ==(i2c)==> board with pwm ==(20m_10core_cable)==> psu+board_with_MOSFET ==> 8x LED strips

What part would you suggest?


Ahh!

Something like this:

http://www.onsemi.com/pub_link/Collateral/CAT9532-D.PDF

It's available from farnell and it does the PWM for you, you just set the duty cycle registers and it does the rest.

Adrian