>> With the original 1000uF I started with, as the circuit draws only >> 250mA, there's about 2Vp-p of 50Hz ripple on ~ 14VDC >=20 > Duff diode in wall wart? Mine are mostly(all?) full bridge so ripple > is 100Hz. Hi George, I was using "50Hz" in the Royal "we" sense, ie I didn't mean it literally, just referring to mains hum. The plugpack is a plain transformer Thanks though Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9228 - Release Date: 03/04/15 --=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 .