| ??? 04/13/07 10:08 Read: times |
#137142 - Specifically Responding to: ???'s previous message |
Andy Neil said:
The 1-Wire Appnotes show some simple roll-your-own interfaces that should be good for 300m or so (they say). APPLICATION NOTE 148: Guidelines for Reliable 1-Wire Networks http://www.maxim-ic.com/appnotes.cfm/an_pk/148 http://pdfserv.maxim-ic.com/en/an/AN148.pdf APPLICATION NOTE 148 said:
a FET driver with slew rate control and a 1,000 pullup resistor can support medium-sized networks. A radius of up to 200m, and a weight of up to 200m, can be reliably supported using this interface.
And here's one I prepared earlier - the two TO-92 devices are two 1-Wire bus drivers: 
|
| Topic | Author | Date |
| dallas one wire : working range ? | 01/01/70 00:00 | |
| Nothing exact, but | 01/01/70 00:00 | |
| a rough translation from our local hw mailing list | 01/01/70 00:00 | |
| they quote 750 meters | 01/01/70 00:00 | |
| EMI | 01/01/70 00:00 | |
| Head end ? | 01/01/70 00:00 | |
| App Notes | 01/01/70 00:00 | |
| Specifically | 01/01/70 00:00 | |
| I had trouble with <3m! | 01/01/70 00:00 | |
| You must be doing it wrong! | 01/01/70 00:00 | |
| 1-wire Christmas tree? | 01/01/70 00:00 | |
| About the 1-wire Christmas tree... | 01/01/70 00:00 | |
| how fast? | 01/01/70 00:00 | |
| ZTX | 01/01/70 00:00 | |
| Funny you should say that... | 01/01/70 00:00 | |
| Relics | 01/01/70 00:00 | |
I've got some OC71s somewhere, too...! | 01/01/70 00:00 | |
| Tried the fet interface... | 01/01/70 00:00 |