Peter, > How can you 'separate' the two diodes ?! Just because they are physically connected in the same package does not mean you always want them in the same spot on the schematic - particularly with say a BAV99 - a A-K-A-K arrangement. You want the common (A-K junction) pin to go to a PIC input (for example) and one diode (gate) to be placed above that input line (to Vcc normally) and another below it (to Ground usually) Regards, Sean -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body