> > My existing sources are "golden dragons" from osram, 1A at 1.8V each, at 850nM > > 850nm is near IR and not visible , all golden dragons I saw are > visible, so which is exactly the part you are talking about ? SFH-4230 The invisible dragon. :) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist