Hello! When I don=B4t got any answers on my question with [OT]: on the subject line and then my=20 circuit, who I want to protect from transients when I connecting it to 230 V main, containing a PIC 16F870 maybe I can change to [PIC]: on the subject line and ask my question again! Here it=B4s Which gives the best protection against transients: Gas dircharge tube and varistor connected in series with each other or is it better to connecting them in parallell across L and N ? Regards =C5keN=20 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu