Thanks Bob I'd also increased Rsense from ~ 0R1 to ~ 0R3, as I thought I'd been a little conservative with the first build. If I need to increase the current further - eg to 1A or more so I can add a 5V Out - I'll probably look at an external FET to take the Ipk off the internal switch And Happy New Year to you too Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7924 / Virus Database: 4739/13683 - Release Date: 12/31/16 --=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 .