PICmeisters I am planning to use a 12C6XX part. (recommended earlier to me by the PIClist) I am going to feed the output of a CdS sensor into the ADC on the 12C6XX. Any suggestions on buffering the CdS cell? (Resistance varies from about 500K t o about 9K) I want low power and low cost (I hear you saying, "sure...right!") Thanks for any help Gus -- Y2K The biggest block party on the planet http://www.frii.com/~wft/Y2K.html Let's party ! ! ! ! ! Gus Calabrese Lola Montes WFT Electronics 4337 Raleigh Street Denver, CO 80212 303 964-9670......voicemail mailto:wft@frii.com http://www.frii.com/~wft Alternate: 791 High Street Estes Park, CO 80517 if no success with wft@frii.com, try .... mailto:wft@bigfoot.com then mailto:wft@eudoramail.com