How about a PIC10F with ADC ? Economy vs discretes might not be too bad in quantity (10F320 ~ NZ$0.70 @ 100) Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7859 / Virus Database: 4664/13358 - Release Date: 11/06/16 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .