If we copy the signal am i changing the strength (current of the signal)? The TENS works on current and it use current to stimulate the human WebSite : http://soonlee.agreatserver.com ----- Original Message ----- From: "Jinx" To: "Microcontroller discussion list - Public." Sent: Monday, February 21, 2005 5:58 AM Subject: Re: [PIC:] electrical switch using Pic >> The siganl source is from the follow device. >> >> http://www.paintechnology.com/046.htm >> >> TENS, Transcutaneous Electrical Neural Stimulation >> >> My project is to increase the number of possible channel but at any >> one time the same number of channel support by the device > > Rather than switch the signal, why not use amplifiers to copy it ? Then > switch signal paths on or off > > Another option could be to use a PIC to examine the original signal > (2-150Hz, 60-250us pulse width). It could then drive a FET or FETs. > An 80V supply is not too difficult. Simple oscillator/inductor for example > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist