My email so kindly sent prior to a paste. Just grab a FET and some resistors if you must use your serial bus master:
http://cdn.sparkfun.com/datasheets/BreakoutBoards/Logic_Level_Bidirectional.pdf Colin On 9/20/2015 10:21 AM, Markus Gaugusch wrote: > Hi, > > I've been using 1wire for a long time on a PC using a ds2480b based serial > adaptor. My bus has become quite long and I'd like to split it up. A > raspberry (b2) hanging around in the upper floor seems to be a good > choice. > > Now my Question: What is the easiest way to connect my 1wire bus? I'd like > to connect some ds18s20 and ds2408 (lcd). > > I have samples of ds2480b and ds2482-800. I don't have a max3232 around to > convert serial between 3,3V and 5V. Pin7 (GPIO4) is used by DHT22 humidity > sensor, but possibly I can use another pin for that one. > I usually solder using breadboard-pcbs and use old floppy cables to > connect the chips like ds2408. > > So, to sum up: If I can build my 1wire bus with any of the above > components I'd be happy if I get a schematic :) > > > Oh, and before I forget: for the bus I need 5V, of course. I'm going to > connect at least one hd4470 LCD with backlight. Currently I supply the > raspberry with micro USB power. I think I can't draw a lot out of the GPIO > 5V pin in this configuration, so most likely I'll have to move the power > supply to the GPIO anyway. Any hints on that? > > > > Markus > > ------------------------------------------------------------------------------ > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
