> There's something fishy here. That's what I reckoned too > Of course, that depends on what your requirements are Immediate (very immediate ie customer going away for holidays and wanted to take it with him) need was to get the 4-20mA going. Which I was relieved to discover did work as advertised and so I pass it on as such. Now that I've got breathing space I thought I'd ask for opinions on the comparator and try out fix-its Thanks _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist