For something that slow, maybe banging it out in firmware is a better approach. But another option is something like 2 - 16F737's. You get 3 PWM's each and I2C. Of if you're really hung up about real estate, there are a couple of TQFP's with 5 PWMs. Another apporach would be to go to something like the 30F2010 with 6. --McD ----- Original Message ----- From: "Andre Abelian" To: "Microcontroller discussion list - Public." Sent: Sunday, August 07, 2005 11:59 AM Subject: Re: [OT] (?) 3 or 4 PWM IC > Ian, > > Scott Dattalo has nice 8 pwm routine I do not think you need any other > hardware. > His routine can control 8 pwm simultaneously. > http://www.dattalo.com/technical/software/pic/pwm8.asm > > Andre > > > > > ianlesnet@cwazy.co.uk wrote: > >>Hello, >> >>I'm not sure if this is OT, so I put it here to be sure. >> >>I am looking for an IC with 3 or 4 hardware pulse width modulators, with >>any kind of interface (I2C, SPI, etc). My current project is to make >>accent lights for my apartment using red/blue/green + white LEDs. I >>didn't see any PICs with 4 PWMs, but I have found some almost suitable >>solutions: >> >>Phillips makes the PCA 9530/1/2/3, an I2C LED dimmer with 2 to 16 bit I/O >>- though each model has only two PWMs total. Also, the SO form parts >>don't seem to actually be purchasable. >> >>The MAX 7313/4/5/6 are similar, though they have PWM on each I/O bit. This >>IC, however, has only 16 preset PWM steps, and comes only in QFN/QSOP >>packages. >> >>Is anyone familiar with an IC that might work? Something with 3 or 4 PWMs >>in SO/DIP would be ideal, it doesn't need to drive the LEDs directly like >>the chips above. >> >>Thank you, >> >>Ian >> >> >> >> >> > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist