[EMAIL PROTECTED] wrote: > Send Owfs-developers mailing list submissions to > owfs-developers@lists.sourceforge.net > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/owfs-developers > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Owfs-developers digest..." > > > Today's Topics: > > 1. Cable length when connecting a 18B20 sensor to a USB dongle > ( Pedro C?rte-Real ) > 2. Re: Cable length when connecting a 18B20 sensor to a USB > dongle (Paul Alfille) > 3. Re: Cable length when connecting a 18B20 sensor to a USB > dongle ( Pedro C?rte-Real ) > 4. Re: Cable length when connecting a 18B20 sensor to a USB > dongle (George M. Zouganelis) > 5. Re: Cable length when connecting a 18B20 sensor to a USB > dongle ( Pedro C?rte-Real ) > 6. Re: Cable length when connecting a 18B20 sensor to a USB > dongle ( Pedro C?rte-Real ) > 7. Re: Cable length when connecting a 18B20 sensor to a USB > dongle (Jan Kandziora) > 8. Re: Cable length when connecting a 18B20 sensor to a USB > dongle ( Pedro C?rte-Real ) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 3 Mar 2007 20:14:33 +0000 > From: " Pedro C?rte-Real " <[EMAIL PROTECTED]> > Subject: [Owfs-developers] Cable length when connecting a 18B20 sensor > to a USB dongle > To: owfs-developers@lists.sourceforge.net > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > I'm trying to use a 18B20 sensor connected to a USB dongle. I've put > the 18B20 sensor directly on an RJ-11 connector. I've connected the > 18B20 Vcc connector to the USB Gnd. When I plug it directly to the > dongle it works fine. If I put it on a 12 meter cable it stops > working. Do I need to power the 18B20 with Vcc for this distance? > > In general what should I look out for in distances over 10 meters? > > Pedro. > > > > ------------------------------ > > Message: 2 > Date: Sat, 3 Mar 2007 15:16:53 -0500 > From: "Paul Alfille" <[EMAIL PROTECTED]> > Subject: Re: [Owfs-developers] Cable length when connecting a 18B20 > sensor to a USB dongle > To: owfs-developers@lists.sourceforge.net > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Are you certain that the extension cable doesn't reverse polarity? > > Paul > > On 3/3/07, Pedro C?rte-Real <[EMAIL PROTECTED]> wrote: > >> I'm trying to use a 18B20 sensor connected to a USB dongle. I've put >> the 18B20 sensor directly on an RJ-11 connector. I've connected the >> 18B20 Vcc connector to the USB Gnd. When I plug it directly to the >> dongle it works fine. If I put it on a 12 meter cable it stops >> working. Do I need to power the 18B20 with Vcc for this distance? >> >> In general what should I look out for in distances over 10 meters? >> >> Pedro. >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share >> your >> opinions on IT & business topics through brief surveys-and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > Message: 3 > Date: Sat, 3 Mar 2007 20:38:38 +0000 > From: " Pedro C?rte-Real " <[EMAIL PROTECTED]> > Subject: Re: [Owfs-developers] Cable length when connecting a 18B20 > sensor to a USB dongle > To: owfs-developers@lists.sourceforge.net > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 3/3/07, Paul Alfille <[EMAIL PROTECTED]> wrote: > >> Are you certain that the extension cable doesn't reverse polarity? >> > > I think not. I've tried with a cable I did myself and one I bought and > I've used a cable tester on them. Everything seems to check out. > > Pedro. > > > > ------------------------------ > > Message: 4 > Date: Sat, 03 Mar 2007 23:16:02 +0200 > From: "George M. Zouganelis" <[EMAIL PROTECTED]> > Subject: Re: [Owfs-developers] Cable length when connecting a 18B20 > sensor to a USB dongle > To: owfs-developers@lists.sourceforge.net > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="utf-8" > > what kind of cable did you use, flat telephone, shielded or unshielded > twisted AWG24? Have you checked for parasitic noise sources near it? > > once I tried a 'T' topology with unshielded AWG24s in a noise free > environment and I got several glitches. > > > Pedro C?rte-Real wrote on 3/3/2007 22:38: > >> On 3/3/07, Paul Alfille <[EMAIL PROTECTED]> wrote: >> >>> Are you certain that the extension cable doesn't reverse polarity? >>> >> I think not. I've tried with a cable I did myself and one I bought and >> I've used a cable tester on them. Everything seems to check out. >> >> Pedro. >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share your >> opinions on IT & business topics through brief surveys-and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: gzoug.vcf > Type: text/x-vcard > Size: 318 bytes > Desc: not available > > ------------------------------ > > Message: 5 > Date: Sat, 3 Mar 2007 21:21:30 +0000 > From: " Pedro C?rte-Real " <[EMAIL PROTECTED]> > Subject: Re: [Owfs-developers] Cable length when connecting a 18B20 > sensor to a USB dongle > To: owfs-developers@lists.sourceforge.net > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 3/3/07, Pedro C?rte-Real <[EMAIL PROTECTED]> wrote: > >> On 3/3/07, Paul Alfille <[EMAIL PROTECTED]> wrote: >> >>> Are you certain that the extension cable doesn't reverse polarity? >>> >> I think not. I've tried with a cable I did myself and one I bought and >> I've used a cable tester on them. Everything seems to check out. >> > > It was this after all. The female<->female connector I was using was > inverting. I swapped the cable around and it now works. > > Thanks, > > Pedro. > > > > ------------------------------ > > Message: 6 > Date: Sat, 3 Mar 2007 21:22:11 +0000 > From: " Pedro C?rte-Real " <[EMAIL PROTECTED]> > Subject: Re: [Owfs-developers] Cable length when connecting a 18B20 > sensor to a USB dongle > To: [EMAIL PROTECTED], owfs-developers@lists.sourceforge.net > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 3/3/07, George M. Zouganelis <[EMAIL PROTECTED]> wrote: > >> what kind of cable did you use, flat telephone, shielded or unshielded >> twisted AWG24? Have you checked for parasitic noise sources near it? >> >> once I tried a 'T' topology with unshielded AWG24s in a noise free >> environment and I got several glitches. >> > > Turns out it was a polarity problem. The cable should be much of a > problem since it's Cat6. > > Pedro. > > > > ------------------------------ > > Message: 7 > Date: Sat, 3 Mar 2007 22:24:41 +0100 > From: Jan Kandziora <[EMAIL PROTECTED]> > Subject: Re: [Owfs-developers] Cable length when connecting a 18B20 > sensor to a USB dongle > To: owfs-developers@lists.sourceforge.net > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Am Samstag, 3. M?rz 2007 21:14 schrieb Pedro C?rte-Real: > >> Do I need to power the 18B20 with Vcc for this distance? >> >> > No. Power requirement of the DS18B20 is max. 1.5mA, which causes only a > voltage drop in the mV range even on long and thin 1W and GND lines. > > Check for contact problems at the connectors. > > > >> In general what should I look out for in distances over 10 meters? >> >> > If you power a lot of onewire chips (and peripheals) over a thin, long cable, > the GND niveau at the end of the cable may reach 0.7V due to the current > through it. This disturbs the onewire function for chips at the end of the > cable a lot. > > Kind regards > > Jan >
Hey i have my DS18s20's all over the house my line length is about 300 feet in total it was difficult but i have 32 ds18s20 and 4 DS2408 all on the same network just add one step at a time. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
