On Mon, Jan 13, 2014 at 4:41 AM, wrote: > I am wondering if they have been a bit cheap and used something like an E= thernet interface transformer with multiple transformers in one package, in= stead of using a proper mains isolation pulse transformer. Rather naughty i= f they have. No, it definitely looks like the right kind of transformer. It has 4 leads (two on each side) and is non encapsulated. Larger than most Ethernet transformers than I've seen. Could be some kind of telcom one though perhaps. > Another possibility is that it is used to generate an isolated power supp= ly connected to the mains voltage for some sensing circuitry? That's sort of where I'm heading. I'll have to extricate the PCB from the case and have a look around. Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=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 .