Would a PIC12F675 using internal osc with code to control the PWM and = AD's, with a linear or log pot as input, or with the PIC using it's A/D = pin as input. The PIC code would be minimal, and certainly offset if = the volume produced is high. =20 Would that work? _____ Lindy > Subject: [EE:] Design Challenge - Lowest cost PWM >=20 > [EE:] Design Challenge - Lowest cost PWM >=20 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.699 / Virus Database: 456 - Release Date: 6/4/2004 =20 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu