Hi to all engineers in this list. I am a middle of making a vcr control unit using pic almost done. the idea of this is to turn the vcr on off play stop and more automatically .since I couldn't find ir remote information about samsung to use UART and I was not smart enough to capture ir code I decided to drive them from switches like pressing buttons. switches are connected together in multiplexed method that means each switch when you press it doesn't ground the only access i have is switches. my question is to press a button electronically should i use optoisolater or can I use electronic analog switch like 4066. any recommendations ? Andre thank you very much. ========================================== = http://www.compufire.com = = mailto:andre@compufire.com = = mailto:mcu-engineering@compufire.com = = Andre Abelian: Engine Electronics, Inc.= = Tel 909-589-5485 Fax 909-598-5695 = ==========================================