Dear Forum, Thank you to all for your answers (especially to Dan, Olin, Andrew, Bob and Josef). The goal of my e-mail was to be sure that I didn't miss the *magic* solution. To be more complete on my project, the PIC is on the body side, and it acquires ECG signal through amplifiers. It also performs calculations like the R-to-R time (R peak in the ECG signal). That side is battery powered. Finally, I think that RS232 is also good candidate for isolation (between the PIC and the digital to RS232 converter), and has a direct connection to the PC. (I have another big project, with many channels and a DSP on the body side. For this project, I will probably use RS422 or CAN, that are good candidates for isolation, and a box that converts it into Ethernet. But it is another story...). Once again, thank you for your help, and best regards, Raymond ----- Original Message ----- From: "Raymond Ranwez" To: Sent: Monday, August 28, 2000 3:32 PM Subject: [EE]: USB isolation > Dear forum, > I'd like to transmit physiological information from a human body (ECG) to a > PC. > USB is a possible solution for the connection to the PC, but I need a 4KV > isolation between the human body and the PC. > Is it stupid to think to isolate the USB bus? > Did someone implement an USB bus isolation? > Thanks for your help, and best regards, > Raymond Ranwez, > Belgium > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu