Robert, I like the single transistor circuit in your link, but I wonder if it will work with 5.5V DTS power source (battery powered terminal) ----- Original Message ----- From: "Robert Rolf" To: Sent: Tuesday, September 02, 2003 6:44 PM Subject: Re: 7404 in an 8 pin DIP? > John Pearson wrote: > > > > ----- Original Message ----- > > From: "Robert Rolf" > > To: > > Sent: Tuesday, September 02, 2003 5:21 PM > > Subject: Re: 7404 in an 8 pin DIP? > > > > > Why not use a couple of transistors for the level translation/inversion? > > > > Could I do it with a couple 2n2222s, no resistors ( I am not very good with > > analog electronics)? > > Yes and No. You do need some resistors to limit currents. > > http://www.hifi-remote.com/wasser/SerialCable.shtml > > You could get rid of the base resistors by using SMT logic level > NFETs. Then you'd only need collector (drain) pullup resistors. > > R > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body